There's certainly a networking and pedigree advantage to be had:
"Social marketing is just starting to bubble up and everybody wants in. But only ex-Googlers needed to apply to invest in MyLikes, a social marketing ad network which just raised a $630,000 seed round. The company, which was founded by two ex-Googlers—former Google Apps product lead Bindu Reddy and former AdSense tech lead Arvind Sundararajan—took money only from 11 other ex-Googlers."
"Social marketing is just starting to bubble up and everybody wants in. But only ex-Googlers needed to apply to invest in MyLikes, a social marketing ad network which just raised a $630,000 seed round. The company, which was founded by two ex-Googlers—former Google Apps product lead Bindu Reddy and former AdSense tech lead Arvind Sundararajan—took money only from 11 other ex-Googlers."
http://techcrunch.com/2010/04/13/mylikes-raises-630000-seed-...