First you must prepare your application by sacrificing a fresh goathead over an alter constructed of Limburger cheese while wearing a stuffed vulture hat. Write out the application useing any fluids resulting from step 1. Next attach your application to a messenger pigeon bound for arena net headquarters. Now while hopping on one foot make 3 rotations clockwise and two counterclockwise while singing koombya and release the pigeon.
Or you could wait till Anet gives us somewhere to sign up for the beta :P like the posters above said its only press invites for this next round. If your considered a member of the press by Anet they will probably contact you. oh and ignore the first paragraph I always wanted to give a silly responce like that.
Damn it, i did this before i knew it was the way to get into beta ;(