The secret to Web 2.0: what do Flickr, Ning, Kiko, Vimeo, Shadows, YouTube, Furl, NewsGator, Shutterfly, Mefeedia, Feedster, Planzo, Zazzle, Tailrank, Yakalike, Qoop, Lulu, Blish, Flagr, FireAnt, Odeo, Measure Map, EVDB, Gather, Oyogi, Last.fm... (kottke.org)
Mefeedia is a website! A website! I should'a known!