The pogoplug makes a great little head-less server but you want to push it to something else. I'm just curious but how would you attach it to a TV? My pink pogo does not have any types of connections beyond USB and power.

I wonder what happens if you plug a usb keyboard into one of the slots? You could try connecting via SSH and then issue a 'dmesg' and 'lsusb' command. You could pipe them to a txt file so you can read them easier 'dmesg > /tmp/dmesgBefore.txt' and 'lsusb > /tmp/lsusbBefore.txt'. Then plug in a USB keyboard and do the commands again: 'dmesg > /tmp/dmesgAfter.txt' and 'lsusb > /tmp/lsusbAfter.txt'

You could use the 'diff' command to see if anything changed:
diff '/tmp/dmesgBefore.txt /tmp/dmesgAfter.txt'

google the linux commands dmesg, lsusb and diff for more information. This would just be a start and I'm not sure the plug could be modified to do what you want to do but it's nice to dream.