Here's a post from the Federal Eye blog on the Washington Post.
More or less, NTEU has come along after helping unionize CBP officers and decided to jump into the fray and gain members. Except AFGE has been then longer and according to Mr. O'Keefe it's going to be:
a classic, no-holds-barred emotional union fight that will account for every last vote
That and read the comments and see just how crappy TSA management is when it comes to our side.