Ironically, Jeff's announcement states:
For the near term, you will see no difference in its operations.
Not quite true: it looks like the modding of the home page to add the Google link has messed up the layout horribly (linux/firefox)! Hopefully this acquisition will not see the problems that Google's acquisition of Urchin produced. At that time, Urchin became unusable and there were many complaints from existing users about price restructuring.