MyDeathSpace.com tracks people with MySpace.com accounts as they die, usually through the news (so a lot of people have died of violent causes).
It's really quite disturbing: you get a picture of the person, a copy of the news article describing their death, and a link to their MySpace profile. The profiles are littered with comments lamenting their death but I don't think they'll ever be deleted.
Certainly a disturbing concept - what happens to all the records of you after you're gone? What about those people who have lots of 'friends' (whether or not you consider this a legitimate friendship is up for debate) who you never meet in real life - will they miss you when you're gone?