I've heard many people express confusion about how to know whether or not to go gluten free, and the pitfalls of celiac testing.
I'd like to leave these two links here. I think this may add to the discussion. This is a blog by a doctor who has celiac. She has an interesting perspective and it's worth taking a look through all her entries just to glean new information.
The first link talks about the finer points of biopsy, and the potential for false negatives in biopsy. I had not heard this before and it may give some people some leads.
In the second link she mentions that autoimmune thyroid patients may have atypical celiac symptoms that get missed. I know I fit this profile.