The first two games set to be published under Microsoft's self-publication program - ID@Xbox - have been revealed as a game called Nutjitsu, and a new Worms title. Microsoft's Phil Spencer revealed the two new games via Twitter, although he didn't go into too much detail.
Nutjitsu is already available to download here for Windows Phone users, and has been created by Ninjabee (World of Keflings). You can see screens for that one below. Not much is known about the Worms game mentioned by Spencer, so we'll update you on that when more information becomes available.