Almost as if they read my blog, Engadget has a preview of a new Acer Revo product that is in very early development stages, but runs Windows Media Center Embedded complete with TV Tuner. Given the price history of Acer's Revo products ($200 to $400), this could very well stand to be the "Sub $500 Box Solution" I explained just yesterday, with a few hard to reproduce bonuses. That touchpad mouse controller is interesting, but my gut tells me navigating WMC with a touchpad would feel clunky after experiencing the native remote support. The keyboard ability is a great feature, though.
Be sure to check out the video below. Clearly, the navigation isn't quite as slick as you'll see on the average Windows Media Center set up, but given that this is still at least six months from store shelves it's possible we'll see some improvements and/or optimizations to make it quite a bit slicker.