it looks like this idea is already in the works. But here goes: A camera/gps hybrid with a community based website similar to nikeplus.com.

For those of you not familiar, nikeplus is technology that tracks your run data (from your shoes / ipod) and uploads it to the uber-fresh flash-based community website. You can already geo-tag your pictures in flickr, but it's kind of a pain in the ass.

This device somehow turns your camera into a GPS, but I think a community based website would be the glue holding the thing together. John Udell made a pretty good DIY attempt.