Internetnews announced that Google has just acquired DoubleClick, an online advertising firm from their primary owners Hellman & Friedman and JIM Equity. Six months before this, Google spent $1.65 billion buying YouTube; 6 months later they spent double ($3.1 billon in cash) buying DoubleClick.com.

DoubleClick.com serves targeted banners on websites like Myspace, The Wall Street Journals and American Online . According to InternetNews, there’ve also been an acquisition talk between DoubleClick and other internet giants like Microsoft, Yahoo and AOL. Will this acquisition put DoubleClck under the roof of Google AdSense, a CPA based Ad network? Or will this be another Google project of its own. We’ll see.