Today Feburary 12 2011
Apple TV’s Micro-USB port
Steps to put Apple TV into DFU mode:
Step 1: Plugin your Apple TV to computer with microUSB.
Step 2: Hold menu + down button together for 6 secs to reboot.
Step 3: Once your Apple TV reboots immediately hold menu + play together until amessage appears in iTunes telling you an Apple TV in recovery mode has been detected.
*** Note: In some occasions it works best to use the usb to Apple Tv 2g and Just press and hold Menu and Play Keys until the lights blinks rapidly.