Miz and Ryback are the only current superstars from Tough Enough to be on the main roster at this point.
Layla is the only Diva Search contestant and Diva Search winner still on the main roster.
Morrison, The Boogeyman, Maven, one of the Spirit Squad and Daniel Puder were all on the main roster for a while before releasing.
Christy Hemme was a Diva Search winner who is now on TNA
Candice Michelle and Ashley Massaro were Diva Search contestants but got released.
Andy, the last winner from Tough Enough, was released from FCW for screwing up.
Ivelisse from the last Tough Enough is on TNA now.
That's pretty much everyone who was relevant that I could remember. Hope it helps.