I'm having the same issue. Camera has worked fine since I received the phone on 10/14/11. I've taken many pictures, used PhotoStream, etc. Just today (during the Halloween parade!) the camera started crashing. I've tried to reset the phone, etc., but nothing has worked yet. Has anyone had any luck with anything short of bringing the phone to an Apple store? I'm not going to have time to do that for a while, but I use the camera for work as well, so I'm in a bit of a bind.
Also, I now can't retrieve the photos I took which are in my camera roll prior to the crash scenario. I'm pretty worried that if I need to replace the phone, I'll never get those photos.
Thanks,
Bryan