BBC should try harder
I'd like to see the BBC get their content rights in order so they can supply as much as possible (of their in-house productions) to a DRM-free implementation, and let the 3rd party content owners haggle about what they provide on the nobody-wants-to-use-this DRM closed source Microsofty product.
I'm pretty confident that an open source implementation would see way more use than most people assume. I don't know many people who would willingly sit at their desktop PC and watch TV, but I believe there's quite a growing market for media centre systems (apple TV and linux-based systems) as well as the portable market (I'd love iPlayer on my Nokia N800 :)
BBC should be leading the way with all this, not playing catch-up. I'd hope they aren't totally at the mercy of other production companies and Microsoft in this respect.