When you brick your OUYA, you need Android’s recovery mode to get it back into a working state.
I knew about " alt + print + i" - http://ouyaforum.com/showthread.php?4247-How-to-Put-OUYA-in-Recovery-Mode
Today while reading the ouya kernel commits I saw one that improves the situation a lot:
This adds the magic key X which when pressed with SysRq and the Right
Alt key, will dump the device back into bootloader (fastboot) mode
for easy recovering.