My 360 has a blog. It's pretty cool. 360voice.com, the site that's running Challenges for the 360 now (because we all now xbox.com sucked at it), also has a feature that takes your games-played history and writes it up in blog form.
It works like mygamercard.net, by reading the history of games you've played since registering at the site, so even though it knows about my gamerscore, teh awesum, it doesn't know everything I've played. Guess I'll have to dig up Perfect Dark Zero again. oh joy.