Ever since I joined facebook I was overwhelmed by a large number of photos and photo albums created by my friends ( you know who you are :)). With a gazillion number of photos, photo browsing, finding and tagging became an addictive activity, and a consuming one.
For a long time I wished that facebook would just import the picasa's ability to auto-recognize the faces and auto-tag them appropriately. I reckon that facial recognition technology shouldn't be so difficult that only Google can do it, and should be important enough for any photo-sharing-intensive sites to have it. Or else how can the users manually identify every single one of their friends in the photos?
So, I was thrilled to learn that face.com has finally taken the challenge to autotag the faces in facebook photos. The marketing material says that face.com employs "the most advance face recognition technology on earth". Although I can't verify the claim, but from my experience it is a very useful application that actually saves your time tremendously, unlike other pointless time-waster applications that suck away your time and serve absolutely no purpose at all ( I'm looking at you, SuperPoke! and MarketPlace).
So, if you have facebook account, why don't you just head over to face.com, and lets it tags you and your friends photos. I'm sure you will find it as useful as I do.