If you haven't seen it yet, Burton Group has a new Identity Blog, and I'm sure it will be great, based on what I have seen in their research and individual blogs. I am a huge Burton Group fan, and strongly recommend subscribing if you are a technology decision maker.
The quality is high, but there are a 2 key things that set Burton apart from other large firms, and make me a fan. One is that they provide seriously in-depth research rather than just uber high-level summaries and pretty charts. The other is that they provide enterprise licensing, so anyone in your organization can browse and access research. Very 2.0 don't you think?