So just an update, for anyone who was curious.

This little guy still has no name, but has become quite the sweetheart. He has only ever struck at me once during his first week here, and that incident was totally my fault (moved too fast and totally spooked him). Since then he's been nothing but a shy snuggle bug. He gets better with every handling. There is no sign of tank aggression, as his previous owner claimed. He is always alert and curious. So far his only problem is that he appears genuinely afraid of his food, a byproduct, I'm sure, of being attacked by his food before. I don't plan on giving up on him though! He's already so much sweeter than he was. =] I believe he'll be another success story for the books! Now to just get him to eat...