You can follow all Sony NAB announcements on twitter: http://twitter.com/sonyelectronics
Sony official NAB website: http://pro.sony.com/bbsccms/ext/BroadcastandBusiness/minisites/NAB2010/index.shtml
UPDATE2 -> ESPN & Sony bring 3d sports to home starting in June. FIFA world cup, Xgames, BCS Bowls and more.
UPDATE -> NAB live