Mix 2011 has opened voting for public session submissions, and I submitted one! Here is the abstract:
Identity Bests – Managing User Identity in the new Decade
Presenter: Steve Syfuhs
Identity is a tricky thing to manage. These days every website requires some knowledge of the user, which inevitably requires users to log in to identify themselves. Over the next few years we will start seeing a shift toward a centralized identity model removing the need to manage users and their credentials for each website. This session will cover the fundamentals of Claims Based Authentication using the Windows Identity Foundation and how you can easily manage user identities across multiple websites as well across organizational boundaries.
If you think this session should be presented please vote: http://live.visitmix.com/OpenCall/Vote/Session/182.
(Please vote even if you don’t! 
)