If you're still looking to do a gluten free beer, I read about a beer that was done by the owners of highgravitybrew.com, and the owner happens to have a gluten allergy and has been experimenting for a while now.
I guess the main complaint with sorgum is that it has a metallic flavour, so they avoid it.
http://blog.highgravitybrew.com/2011/03/my-latest-gluten-free-beer/It is a woman that made the recipe and I'm not sure how much we can trust a lady when it comes to beer recipes, but thought it could be of value.
