So after much speculation (and on the Friday 13th, day of the GWB swap to SubText), it looks like it is now official. Google has bought DoubleClick for $3.1 Billion. The official news release can be found at: http://www.businessweek.com/technology/content/apr2007/tc20070414_675511.htm?chan=top+news_top+news+index_businessweek+exclusives.
It seems like we just can't go a few weeks without another eye-catching Google announcement. It's interesting to observe the large amounts of cash Google throws towards these acquisitions. This comes in light or to complement their Pay-per-action efforts, depending on how you see it.
One ad at a time...Google is taking over the world.