I have only tried one USB keyboard (a cheap, clearance unit from Tech Solutions, model KU-2971) and it worked upon pluggin in the USB cable. However, the numeric keypad doesn't work (not sure if this is a problem with this particular keyboard or all when used with the ePods). Try the suggested soft reset and see if yours comes to life...
(As another question, has anyone been able to use key combinations (like the ALT/arrow keys for strafing in Doom)? Again, it may be my keyboard being junk, or maybe the ePods doesn't like this kind of combo.
(The emperor has no style)