This isn't really news given that the signing was reported a couple of days ago, but it now appears to be official, per Jenna Laine:
It's official. Of course Steve White was all excited about it, what with him coaching Selvie at USF and all. Selvie has the talent to be a good pass rusher, but he hasn't shown it in the NFL. Is he a late bloomer or will he simply be a camp body? Time will tell.