What are some good finger foods for baby?

My 9-month-old LOVES to feed himself (and it really frees me up to do other things) so I'm looking for some new finger food ideas for him. Right now, he's rocking the cheerios, cut up cheese and those gerber puff things. I've tried spiral pasta cooked very well but that seems to make him choke -- don't know if it's the shape, texture or what but it just doesn't work. What else can I give him that he can mash up with his gums (no teeth yet). He has the pincer grasp down well and he doesn't let his toothlessness get in his way. Any ideas?