Thanks all who answered!
As a follow-up:
1. Has anyone experienced ANY problem with interfering with existing functionality (rentals, YouTube, Podcasts, etc.)?
2. How easy is it to roll back to the original non-Boxee firmware?
3. I assume updating the Apple firmware will overwrite Boxee?
4. What is the upgrade story for the Boxee hack itself? Do you get updates from online?
1. None at all with rentals, youtube or podcasts (or any of the other ATV functionality. The only odd thing it did once was pair to a non existent remote...not sure what that was about...easy to fix though...
2. Just hit restore on the Apple TV. This is like DS hacking...its totally painless and transparent to the system itself
3. I don't think anyone has an answer for this, as apple hasn't released an update since boxee has been out. My guess is yes, the next ATV upgrade will kill boxee.
4. There is an upgrade option within the boxee menu. Its easy, the only problem is it doesnt keep track of what update you did last, if you don't right down the number, its hard to know if there is a new update or not.
I haven't turned off my screen saver, and it hasn't caused me much of a problem. Boxee did freeze up on my once, not sure if that would have had anything to do with screen saver.
I just got my ATV this week, and hacked it the day I got it. Its a awesome little machine now. however, while boxee is very very good, it isn't perfect. You will get some stutter in hulu for example. it seems worse at times and better at others. not sure what causes it. hope it can be fixed in a future update. I watched through the first episode of "fringe" on boxee, and it was almost perfect. Tonight i watched through the first episode of "Crusoe" and the stutter was terrible the whole way though...seems a bit hit or miss...