http://thenextweb.com/twitter/2011/10/25/google-senior-media-liaison-karen-wickre-leaves-google-for-twitter/
Karen Wickre, the Senior Media Liaison at Google for the last nine years has left Google and joined Twitter.
Wickre held a very senior PR position at Google for a long time, and was the go between for project managers and the media. Many at Google enjoyed working with her immensely.