Well, I wanted to try it, but it apparently doesn't work with Chrome or IE8, so started up Firefox and now it tells me my connection is 177kb (I have 10M down). Maybe they're just getting slammed right now.
I'll try it later, I guess.
EDIT: Did manage to get it downloaded and installed, but I guess I'm not sure what to do now. I see 4 "channels" on the left, but they only play a short intro commercial (which looks pretty good quality wise) then it doesn't do anything. Just staring at a black screen that says "playing" in the lower left.