Sergey Brin has launched his own personal blog. He is talking about Parkinson's Disease, his risk of getting the disease, and some other posts. The blog is very new so doesn't have much content but I think I will be reading it fairly regularly. It's called TOO, kinda like google is malformed googol, Too is played off of Two. According to him on his first post, Two = in addition = his life outside of work.
Sidenote: Really ugly blog design, cannot believe of all the standard templates Blogger has, he chose something that's this hard to read.