The masses have spoken (well, the 15 of my friends who voted on the question). I registered GlutenSavvy.com and have posted the first three restaurant reviews. It’s currently not hugely pretty but it’ll do. Please register and contribute reviews of restaurants in your area! I’ve posted editorial guidelines under “Get involved!’
I’m also looking for designers and coders to make it prettier and more functional (it’s currently just a blog). I’m very happy to give admin access to anyone who knows what they’re doing with that stuff (WordPress, CSS, PHP).