There'll be a big dip when the stock options vest in Aug 2008:

By some estimates, more than 900 employees became instant millionaires when Google went public in August 2004, and that total has likely ballooned along with the stock price. ... By some estimates, nearly a third of the first 500 Googlers have departed, and many more of the estimated 2,200 pre-IPO employees are planning an exit as their stock vests. -- http://www.news.com/Life-after-Google%2C-with-millions/2100-...