Correct - I should have been more specific. Waiting for aTV flash to support NAS. That's my main usage scenario.
Did you use seasonpass? You might want to try pwnage tool. I found it far easier than seasonpass. In an attempt to make it as simple as possible they have made it fragile. You can still install atvflash after any jailbreak. Anyway, have a look here: http://www.youtube.com/watch?v=4EWKr7Ww_c0
The process for getting it into DFU mode may not work if you have the power plugged in. I kept it off and plugged it in after it entered DFU mode. My last experiment was to leave the power off completely when booting ( but connected via usb). It's actually very simple. Just seems hard the first couple of times. I never was able to use seasonpass successfully.