How many different models of GPS cameras are there and where can I find them?

The the new Iphoto software that comes with Ilife 09 for the MAC is integrated with GPS cameras. I really would like to find one, but I can find too much info on the web. Are they readily accessible yet? and if so, where can I find them?

http://www.pronto.com/user/search.do?displayQuery=gps%20cameras&SEM=true&query=gps%20cameras&adid=gps-gbm2497-0_ys&ref={keyword}&creativeid={creative}&site={placement}&OVRAW=GPS%20cameras&OVKEY=gps%20camera&OVMTC=standard&OVADID=21030711012&OVKWID=198459718512&loadingComplete=true

not sure how this will improve your photos. if you know where you are then the camera dose'nt need to know, or does he?. am i missing something?http://search.yahoo.com/search?p=GPS+cameras&ygmasrchbtn=web+search&fr=ush-ans