The Xbox 360 Fall Update has landed! [update]

Doubtless everyone out there has already nabbed the Fall Update, but it is our responsibility, nay, our duty to inform you that it has arrived. We've been messing around with some of the new features and so far we're pretty pleased with what's on display. The "twist" navigation is very nice, and saves many steps in the Marketplace process. The Inside Xbox feature is pretty nifty as well, and even includes a video with Major Nelson explaining all the fabulous new features in the update. Xbox Originals are up, and we have a powerful urge to buy Psychonauts, and urge we have so far resisted. Also, we're not positive, but the actual Guide interface seems a tiny bit faster and smoother. Naturally, we haven't tooled around with everything yet. We've yet to add our Bio or change our LiveID, for example (you should think twice about changing yours, by the way ... for now at least). Overall, the changes seem fairly small, but welcome.

So, now that we've all had a chance to mess around with the update, what's your favorite new feature? Have you found anything that Microsoft hasn't already mentioned?

[Update: A Twitter post by Microsoft's TriXie informs us that the Inside Xbox feature is currently available only in the US, UK, and Japan. Other territories will follow in the months ahead (thanks, DjDATZ).]