The transcript of a fantastic talk Cory Doctorow gave on DRM to Microsoft Research is available here. He is basically trying to convince them of the following:
1. That DRM systems don't work
2. That DRM systems are bad for society
3. That DRM systems are bad for business
4. That DRM systems are bad for artists
5. That DRM is a bad business-move for MSFT
It's quite a hill he has to climb, but it's absolutely inspiring, smart and painfully dead on.