Google's Buying Spree Continues

Google filed their first quarter 2006 10-Q yesterday. In Note 4 of the financial statements, they confirm that they closed on the dMarc Broadcasting acquisition. In addition they disclosed that they acquired four additional companies in the first quarter. They don't give any names though. This is in addition to the 15 companies they acquired in 2005. Any ideas?

During the three months ended March 31, 2006, we also acquired all of the voting interests of four other companies. One of these transactions was accounted for as a business combination. Because the remaining three transactions were with companies considered to be development stage enterprises, they were accounted for as asset purchases in accordance with EITF Issue No. 98-3,... The total purchase price of this business combination and these asset purchases was $79.2 million, which primarily consisted of cash payments of $75.7 million. In addition, we are obligated to make additional cash payments of up to $17.9 million if certain performance targets are met through March 2010.