Goodbye Microsoft, Hello Facebook (2010)
worldofsu.com
worldofsu.com
I remember reading this post of his titled "Ten Things I Hate About Working at Facebook" (http://worldofsu.com/philipsu/2012/08/ten-things-i-hate-abou...). It does sound like he's having a blast there- it'd be interesting to read a follow-up comparing the two companies.
Source: I work at FB. Also, just use the Googles...
edit: I'm an idiot; brain fart on a Saturday at the office