Looks interesting - but I wonder how it will feel to use. Kinda hard to imagine the feel of it from watching the keynote. I also wonder if it will allow people to bug the heck out of you. Lets hope there is an easy way to ban people, or to segment people into certain areas. Kinda like how MS Live has different groupings you can join. I know i dont wanna be bugged by weirdos while using my system!