This article from Business Week is great - particularly for a couple of the quotes about the problems at Sony BMG from Counterpane CTO, Bruce Schneier:

"Making digital files not copyable is like making water not wet"

"DRM is a desparate attempt to cling to...old business model(s). They have to figure out how to make money in the new world".

There is a lesson to be learned here for all content publishers, regardless of  what business sector they were in in the old world - they are now in the digital world, the barriers are down, and the only way to operate is within the community is as a member with equivalent voice to all their customers and consumers.