Thumbprint Unlock for Evo: trick or treat?

[Boaz65]

So I'm hanging out at my cousins salon and this guy comes in with several phones, one is an EVO. I'm assuming he's some type of rep since he's trying to sell phone contract etc. Anyway, he pulls out his EVO and was showing it around asking people to try to unlock it using their thumb print. 3 or 4 people tried it and it wouldn't work, he takes his thumb and places it on the screen and it unlocks. If this is an actual working program, where can I get it for my EVO? If he's just doing some "slight of...thumb" trickery, it was pretty slick and I STILL want to know where or how I can get it! Anyone have this on their EVO?