Of course, I also suspect that this wasn't the *only* reason Adam was imprisoned -- just the reason Adam thought Peter would sympathize with the most.

Agreed.

I am suddenly gripped with an insane urge to go through the other Heroes episodes and see how much Angela touches other people, especially when she is trying to convince them of something.

In the pilot, she and Peter press their foreheads together but that's a gesture initialized by Peter as an attempt at comfort; she later slaps him in the "Nathan doesn't love you" scene when he keeps insisting Nathan does. She touches Peter in the hospital when she tells him his father was diagnosed as manic depressive and with delusions of grandeur with 23, that the heart attacks were all suicide attempts and that he finally did commit suicide. She doesn't touch Nathan - or anyone else at all right until The Hard Part, when she reveals to Nathan she's supporting Linderman's plan, and then she keeps touching him on the shoulder, which is what made people wonder to begin with.

wee_warrior had said that Angela's general prickliness and NOT touching people would tie very much to touch-as-her-power; by now she probably is in complete control of it, but as a young woman when she still was still learning, she could have developed both the general restraint and the complete opposite, the emphatic touching when she wants something, in order not to do it by accident. And of course both Nathan and Peter, who do touch whenever they want to make a point or convince each other of something, would have subconsciously picked up that mannerism from her without realising the reason for it.

Passport: actually, Adam hands that over to Peter together with the plane ticket. Which is either bad writing or a giveaway that Peter wasn't the only ally Adam had while still imprisoned by the Company, since someone must have procured that passport for him. And yes, that points to Angela.