I've been playing with Hipstamatic, a very cool new iPhone app that emulates the look and functions of old Kodak Instamatic cameras and gives the camera a new Boc-ish slant. It lets you flip lenses and flashes, buy new add-ones, share your pics etc. I've posted a couple below from my experiments.
Full size here: http://twitpic.com/14bioj
Full size here: http://twitpic.com/146n0u
Worth a play if you're iPhoned up and fed up of some of the guff the camera spits out..