Have to say that is a really nice thing for them to do. If the firmware upgrade breaks your 360, you can call them and get a NEW 360s 250gb model plus a year of Live.
I have a pretty good chance of being one since my box is a March after launch 360. I guess it's time to dust it off and plug it back in and do an update
. I haven't used it in a couple of years since mine is loud as a jet engine.