I could see the whole operation moving over near LinkedIn's new digs near Maude...Microsoft's "campus" off of Shoreline is definitely "meh". Microsoft seems to be investing elsewhere for new digs anyway; they have a new building on the Sunnyvale side of Moffett.
There has not been much announced in way of what Microsoft intends to do with LinkedIn, so you haven't missed much. The acquisition hasn't gone through yet.