Trying to use Xbox controller on Nexus 7 I just got the Asus Nexus 7 and I am attempting to play the N64 emulator (Mupen64 plus, AE). I have my wired xbox 360 controller plugged in to the otg cable, but the light does not stay on the controller and the Nexus is not reading it. Only when I press it does it flash for a second. Help?
This very comprehensive article entitled "Guide to Game Controllers on Android" published on 9th May 2012 maybe greatly beneficial to you:

http://www.pocketables.com/2012/05/guide-to-game-controllers-on-android.html

You may also be interested in this video (approx.45 mins duration) entitled "Gaming On The Nexus 7 With A PS3 Controller"

http://revision3.com/hak5/how-to-bluetooth-a-controller-to-nexus