Meh.... to all the people that still don't like this idea: Remeber this, DRM is NOT going entirely away. Even companies that take it off will continue looking for a solution, and this is a step in the right direction.
I just wonder how this will go for other forms of media, especially games. I mean, if I buy a game and want to let my friend try it out, or install it on their computer to show it to them, etc. will this let me do that? Can I also share something virtually (As if I buy something through Steam/Direct2Drive/digital distribution, can I loan it to someone the same way I can a normal disk?)
One thing I see as a problem: what stops large groups from saying everyone is their friend, and creating a huge domain where many people only have to buy things once. Say me and all my 400 facebook buddies share all our music videos. If 50 of us would have downloaded/bought the same video, now we only buy it once, what stops this? (I'm not really talking about close friends sharing, really, I'm talking about hundreds/thousands sharing).