trouble for damon?

Yep. Bonnie seems mean and fierce, she won't let go of her promise.
I think Bonnie will hurt him up to a point..
Elena is most likely going to stop her and save him! :)

Is this the Katerina interview?

Im not liking this new Bonnie..

I think that if provoked, Bonnie could definitely cause serious trouble for Damon and Stefan. I can totally see her becoming their main enemy and putting Elena right in the middle so she will have to pick sides eventually. The synopsis for Season 2 berkata that allies will become enemies and I think this could mean Elena and Bonnie. Elena has formed close connections to vampire and although she will want to keep Bonnie as a friend (unless Bonnie does something terrible), she will pick the Salvatore brothers over her friendship with Bonnie. I don't think Elena will let Bonnie hurt Damon (even though he can hold his own, but we are talking about supernatural powers over vampire strengh and speed here), and I wouldn't be surprised if she did save him. Obviously, Bonnie won't be able to take the fact that Elena is choosing to side with vampire over her lightly. It may not happen in Season 2, but Elena's friendship with Bonnie will probably be severed at some point.