Filed under: Deals, Google (GOOG), Microsoft (MSFT)Google has agreed to buy DoubleClick for the (let's just say it) outrageous price of $3.1 billion. Has the dotcom boom returned? I remember when DoubleClick, Inc. was cool before, back in 1999. When I graduated from business school, one of my best friends went to work there. She loved her job (which was largely managing the integration of acquisitions, it seemed) but even then the company was in turmoil -- I can remember frequent tales of colleagues and supervisors scattering to go to sexier dotcoms, or bigger, more reliable companies.And then, about the time my friend left, DoubleClick lost its aging appeal and was a necessary evil. In April 2005, the company fetched $1.1 billion when it was taken private by ...