Micorosoft have plans to acquire Yammer (Enterprise social network leader )
If yes, you must have heard of Yammer; Mr Sacks (Also, the founder of Pay Pal) has Launched Yammer in 2008 and it became very popular among enterprise social network folks.
Today MICROSOFT and announced their plans to acquire the Yammer Inc by bidding $1.2 Billion Cash. In less than a year's time it would be second big deal for Microsoft after $8.5 Billion Skype Deal.
Trend is just showing that every big gamer is moving towards the networking (social / enterprise / advertising) industry and making sure they have best resources in their kitty, isn't it?
-CB