I friend of mine who is allergic to wheat gluten recently discovered
a grain called "spelt". I believe it is just about the closest grain
to wheat in terms of how its flour behaves when you bake, but it is
not close enough to wheat to cause my friend problems. I believe she
has been quite successful at baking by simply substituting spelt flour
for wheat flour, even in bread machine recipes. I'm not sure where
you could find it - if you can't send me mail, and I'll ask and post
the response.
Dave W