i am definately interested in this.
i already have 3 airport xpress' streaming my music, and home theaters systems in 3 rooms at home. this is just another piece of the puzzle in eliminating wires throughout the home.
i am a tad nervous as steve mentioned dolby surround for the itunes store movies, and not 5.1 (or better). I am a pretty serious audiophile, and my main theater setup is 7.1, the last thing i want to do is start to consolidate/replace my dvd collection (1000+) onto one of my macs with standard dolby surround. Until 5.1 digital is offered, i dont see myself downloading too many movies. However, just for the convienience of browsing my libraries and streaming slideshows alone make the iTV worth the money. Throw in 5.1 and Im sold. I would definately buy more than one, and know many others that would do so as well.
it will be interesting to see if there will be any kind of "zone" capability. Say I have my downloaded movies on my quad in the office (largest HD capacity-will probably hold majority of my media), and want to watch Cars in the theater, but the girlfriend wants to catch up on Lost in the bedroom.... both are stored on one mac, would it even be possible to stream seperate files to different iTVs? If that feature IS in fact possible, and apple incorperates it, I see this device as revolutionizing home entertainment. Imagine being able to pick up multiple boxes, and basically have a central server providing individual entertainment to various rooms of the house. Kids listening to their iTunes music in their rooms, while mom watches Desperate Housewives in the bedroom, and dad catches up on the NFL season pass on the couch. Sure, there are ways to do this now, but the equipment, install and knowledge to achieve it makes it out of reach for many. After the cost of the computer (which most people already have obviously) and a tv/stereo setup for each room, 300 bucks to create a total interactive solutions is a STEAL.
alot of whining is going on already about this product, no dvr, no drive, no storage.... well thats the point. to add all those things, you arent gonna fit it in a slick box like that, not to mention that most of the people interested in this device, already have a stereo/theater setup with DVD players (how many people do YOU know that DONT own a dvd player? - i have 9 at home and 2 in the car), and you surely arent going to get all those things for 3 bills.
overall, todays event couldnt have been better.... unless they would have released the iPhone so i can finally throw my RAZR off a building.