Rachel, sorry to hear you're in so much pain.
Keeping in mind that I'm vegan, I like to read Dr. McDougall's take on things. Even though I don't always agree with everything he says (he's not well-informed on gluten sensitivity for one thing), he does tend to have studies to back up his comments. In any case, I thought I'd post a link to an article he wrote about gout ... for an alternative point of view. Take what you like and leave the rest.
http://www.drmcdougall.com/misc/2006nl/june/gout.htm