According to Dealmac, you can pay for this through your iTunes account, so I assume that Apple gets their standard cut for people who subscribe that way. I hope this is a precursor to a full-blown app store for ATV.
Haven't we heard this all before? I still haven't seen the iPhone nano, also rumored by WSJ among others:
Okay, I'll speak slower. When I say "think iPod nano" I'm referring to actual clock, e.g, hands, time constantly showing, tick tock, clock. While there are apps that provide this functionality, the clock app does not.