go to HP.com, they have a good selection for decent prices easy to use and hook up on ANY computer with 2000 or XP os, just set them to disk drive instead of digital camera.. I have the 635. not a bad camera. 16x11 at full res and decent light. go 3.2+ though for best results.
Look out for Minoltas. We had a 4-gig for a while, served us great, until we brang it down to Mexico, and it totally bugged out on us, zooming in and out by itself, and overheating itself until it died.