Search engine leader Google is buying privately held DoubleClick, a top digital marketing services firm, for $3.1 billion in cash, the companies said Friday afternoon.

Google (Charts) is buying DoubleClick from private equity firm Hellman & Friedman, which bought DoubleClick in 2005 for $1.1 billion in a deal that took the company private.

All your ad are belong to Google.

[ Um, someone made a good investment... that's damn near a 300% gain in 2 years. Fucking a. -k]

Google scoops up DoubleClick for $3.1 billion - Apr. 13, 2007