It’s come to this: NBA players are Twittering at halftime.  Charlie Villanueva and renowned Twitter-star Shaquille O’Neal have created headlines recently for failing to check their Twitter habits during games.  The development is great for fans craving the inside scoop.  It’s also a boon for players seeking to brand themselves.  It’s unclear how Twitter affects performance.    But it really doesn’t matter- the age of instant communication is upon us.