Microsoft is just distributing Dance Central 3, Harmonix is publishing it themselves. Ska Studios is publishing Charlie Murder. Super T.I.M.E. Force is being published by Capybara Games (and it's a 2013 release anyways). Spelunky was published by Mossmouth. BattleBlock Theater is from The Beheamoth and has no release date yet. I can't even find any information on Fire Pro Wrestling for Xbox 360 other than it is developed by Spike and uses Avartars (can't find a publisher or if it even has a real release date or title).
Connected Experiences, Kids and Lifestyle Entertainment, Microsoft Studios – Redmond Publishing, Platform Next Studios, Playful Learning, Skybox Sports, Microsoft Studios – London, Press Play, Microsoft Studios Vancouver, and Microsoft Studios Victoria have not made any games and they are only working on "untitled projects".
tendo, not surprised. Of the ones you said you haven't heard of, only 2 have made games that are out or even announced. Microsoft Studios - Mobile Gaming made ilomilo (for Windows Phone 7, Xbox Live Arcade, and Windows 8 ). Xbox Live Productions published the Xbox Live Arcade games South Park Let's Go Tower Defense Play and South Park: Tenorman's Revenge and made Avatar Kinect.