It's probably easier for me to figure out who I think -isn't- scum, then who I think is. Therefore, my list will start with least likely scum and progress to most likely to be scum.
Yosarian - Despite his reputation as 'hard to read', I feel that I generally have decent instincts when it comes to Yos. (So long as I don't second guess myself) I have felt a very pro-town vibe from Yos starting when I began reading the game, and it has continued throughout. I also felt very comfortable with him in our private conversation, which I think, due to the length of it, I would've gotten some indicator or feeling about him if he was scum.
EyceKing/PJ - I've gone over EyceKing's posts a couple of times and while there was a slight lack of them, there are also posts with decent content and contribution. In addition, those posts give me a more pro-town vibe than not. I think what stuck out the most pro-town for me about EyceKing was his day 0 behavior in regards to his voting for director. First he admits that he lacks knowledge about the players in the game, but felt voting for Yosarian (the person that there was a consensus of being best/brightest) was the right path to take. When he was accused of being a sheep, he defended his thought process behind that vote with what I felt was very pro-town reasoning. IE: Rather vote for someone who would be a strong pro-town leader and take the risk they might be scum for a bigger payoff. He later removed the vote, indicating to me he was still thinking through his decision, something I also find to be fairly pro-town. It also proves he wasn't being the 'sheep' he was accused of being earlier. I'll agree many of his posts lack in the way of hunting scum and seem to be more mechanics based. However, when he felt he had a concrete reasoning to FoS and vote, he did. I can't really find someone scummy for being wrong about a person, especially a person that got lynched for the very thing that EyceKing had voted him for.
On to the PJ part: PJ's entrance was pretty much exactly as I expected it would be. I fully disagree that he might've been trying to cover up EyceKing's shortcomings. PJ is always very contributive in any game he's in. Anyways, he immediately began looking for inconsistancies in play and possible scum. His observation of Albert's behavior before the hacking took place is one example of this. I think the most damning thing for PJ is the nearly disastrous error he made in the OTM assassination. I seriously don't think PJ would do this as scum, while WIFOM I suppose, I just can't see PJ making a major error and then saying 'Oops, I thought blah blah blah' if he were scum. Also, one thing I like about PJ is his latest response to UA. When replacing, it's easiest for scum to say 'don't blame me for the actions of my predeccessor, they were being an idiot' or something to that effect. The fact that PJ actually attempted to find reasoning behind his predeccessor's thinking and defend it is a more pro-town behavior than a scum behavior. To end, the three hour conversation with Yos to discuss how to find the bomb, etc, is something I can totally see a town PJ doing. The only way it might not be pro-town is if he was scum with Yos and I already said I don't think Yos is scum. I also don't think if they were scum planning, they'd throw it out in the open that they talked for such a length of time. Again, WIFOM-ish, but almost everything in mafia is.
Somewhat unlikely to be scum
Kinetic - Kinetic is not in the previous category because I'm slightly sketchy on him. While he answered my question about his vote change yesterday, I still find it odd. Especially because he says he was manipulated into the vote change. This statement strikes me as odd after his statements about not being so easily manipulated (as his predeccessor) when he joined the game. I also don't really like his last post, which feels somewhat like a fishing expedition to me. Besides those two things, I can't find much at fault with Kinetic's behavior and I find a certain lack of connection between him and other players, besides maybe Yos. I am not entirely dismissing him as possible scum, but I do find it unlikely.
Slightly unlikely to be scum
UA - Kinetic and UA are almost equal, but not quite. I trust UA less than I trust Kinetic. I don't necessarily have anything concrete here, but mostly a gut feeling. UA has slid through the game without hardly any scrutiny whatsoever. I also get a feeling of opportunism from him, as far as his voting yesterday is concerned. He was willing to vote any of the three top candidates and in fact did vote each of them one time. I'm also noting a slight connection between him and Spambot. In the earlier Spambot wagon, UA went out of his way to voice that he wouldn't be voting for Spambot. This isn't really huge evidence, but something I noted. Also, UA again today slightly defends Spambot, but doesn't really seem to want to fully commit to the defense. This indicates to me that he may be weakly trying to protect a scumbuddy, but wants to keep his avenues open, just in case Spambot is proven to be scum. I also don't like the reasoning UA gave for his suspicions of PJ in his last post. Casting suspicion on PJ for working hard as soon as he joined the game, is akin to the 'too townie' accusation for my tastes. Last, I'd like to mention that UA is beginning to pull the 'I didn't get a PM' card himself now that OTM has shown up town, which doesn't sit right with me, especially when UA was one of the people who was originally saying that it wasn't proof.
Something of note before I move on: I do believe one of Kinetic/UA is quite possibly scum. It seems way too 'easy' for it to simply be Guardian, Albert, and Spambot.
Guardian - Yes, I'm putting Guardian in the same category as UA. I don't think I need to describe why Guardian may be scum, that's been gone over ad nauseum the entire game. I've already stated in past posts why I think he may not be scum. I guess I just don't know. With the sheer number of folks willing to vote/attack him at one point or another, either he's town and scum have been looking for an easy lynch (which obviously it hasn't been that easy, seeing that he's still alive) or he has been a victim of bussing.
Albert - I don't buy the whole 'I'm in the latecomers group'. To me, that's just not justification of anything. I refuse to metagame on that level, enough said. What -really- bothers me about Albert is his attempts to mislead the town for the sake of a 'trap'. I find that 'traps' of this nature are usually scum attempting to cast suspicion on someone who is pro-town. I also think that PJ might've been onto something with Albert's behavior before the hack happened. Looking back on it, it's quite possible that Albert was verifying actions to be sure to get the hack in at the right time. I'm also fairly suspicious of his continuous attacks on Yos and defense of Guardian. Otherwise, he has been fairly unhelpful with the one-liners and 'kill, kill, kill' type attitude until he's under scrutiny himself. The fact that he is capable of clear, constructive thought when attacked makes me wonder where it is when he's not under attack.
Spambot - As I said before, I don't have much, but that is a good indicator that Spambot has been floating under the radar way too much the entire game. With this (and what CTD didn't like) Spambot's hammer on YB is suspicious and quite possibly opportunistic. In addition, I felt that his post on day 0, attacking EyceKing was also opportunistic. One thing I noticed was his use of 'medium-sized tell'. I know some pro-town players like to use 'scumtells' as reasoning behind their suspicions and voting, but more often than not, it's scum who use scumtells as a crutch, especially when going after inexperienced players and even more so when they are inexperienced themselves (as Spambot shows early on with his 'What is IGMEOY question). Finally, there's fact that I'm suspicious of a Spambot/UA connection and I find it difficult finding a scenario with the lineup of players we have where Spambot wouldn't be scum.
Oh and to answer Kinetic: What Yos said.