Here are some links to really good articles surveying DRM developments in 2005, all from DRMWatch:

--DRM Standards

The new area for progress in DRM standards shifted from DRM technology per se to various flavors of DRM interoperability -- a problem that is necessary but considerably harder to solve.

--DRM Technologies

Content providers are beginning to be comfortable with the idea of licensing their content for use on a wide variety of devices in consumers’ homes, briefcases, and purses; and technologies such as Windows Media DRM for Portable Devices and TiVoToGo are starting to appear that give consumers some flexibility. Meanwhile, Apple’s world remains closed – and like any “gorilla,” public opinion is turning against it.

Well, I'm not sure the mob is quite ready to rend Apple yet, but we'll see.