In case you are interested in what I’ve been up to since working on OAuth, I create an alternative solution called Oz. You can read about it in this blog post.
I am no longer involved in the 2.0 effort and have withdraw my name and support from it. I highly recommend you use OAuth 1.0 as 2.0 is likely to create security exploits. You might also want to check out Hawk and Oz, my OAuth replacement solution.