Well there are some guesses...
http://www.thesixthaxis.com/2012/10/02/lets-guess-at-what-playstation-mobile-games-will-release-tomorrow-for-ps-vita/
Should be an blog post up later today on the official PSBlog.
http://gamrconnect.vgchartz.com/thread.php?id=130023&page=1# Official Playstation Vita Thread! Come in and join!!!