I just found this cool free app, Visidon. https://market.android.com/details?id=visidon.AppLock&feature=search_result It's the the best (If not the only) app that I have found that will detect your face reliably to unlock something. Unfortunately it works only to lock applications. I would love for this app to replace my lock screen so that I could unlock the device with face recognition. Is there some combination of apps I could use (WidgetLocker, Tasker etc...) to use Visidon as a lock screen. Hope you like the app and thanks!