The wireless controllers were mentioned as using the infrared receiver, but considering the Xbox Live headset plugs into the controller, I'm guessing that might not be quite right (maybe I read it wrong).
I'm really excited by the ubiquity of Live, and I'm looking forward to getting one. And PGR3. Mmm. Oh, and output options weren't covered in detail, but I still want a semi-intelligent DVI adapter for it, please Mr Allard!
I personally didn't find the MTV spot as exciting or compelling as the writeups appearing on the web - but I don't think I was really the target audience.
Doesn't matter - I'm getting one. That simple.
[Update] Greg Hughes links to a more concise video from OurColony.
[Anotherupdate] Oh - and did I see right that what looked like a MechWarrior game was billed as being Quake 4?
[YetAnotherUpdate] XBox 360 Spec Sheet is now available, makes for an interesting read.
[LabouringTheJoke] JayBlog has a neat little thread'o'speculation.