We have a [http://www.wikitree.com/wiki/Project:DNA
Project for DNA] where a lot of great new things are happening. It has information listed that might be helpful.
Feel free to contact any of the members of the DNA project for additional details.
I haven't had my DNA tested yet, so beyond that I don't know much, but there are knowledgable people on the project who are enthusiastic about the DNA testing and using it in genealogy.