A Visual History of Seeing
Tudor is right - systematically mapping out one's photographic history on a map is a tremendously satisfying pursuit.
I've only made it through a sliver of my sighted sites, and international support seems to be lacking thus far... but if you're looking for a new drug - this one won't spill, cost too much, or come in a pill!
If Stewart Butterfield came up with a way to package Flickr in a capsulated format, I'd be first in line at the pharmacy. Perhaps it could be sold as artistic emergency contraception:
"Neglected to take the necessary precautions of notation when your machine started 'snapping shots?' Flickr is here to help! Ingest with one gravol, and find all the organization you've been dreaming of!"