I've had it, and as others who's gotten it know, the pain is un-freaking-believable. As Entropy noted, it is caused by excess Uric Acid, not too much fat in your diet. Many things can cause an excess of Uric acid--organ meats (liver, etc) and excess proteins in general, as well as beer.
Check out a few things to keep it from ever happening again. Change your diet, it will definitely make a difference. Cherries DO help, something about one of the mineral that make them red does it, can't remember the name.
The things that I've found that absolutely work wonders are the supplements named in The Arthritis Cure by a Doctor Theodosakis (sp?)--Glucosamine and Chondroitin. Daily does is about 1200 milligrams of Chondroitin and 1500 milligrams of Glucosamine. See the book or the web for details.
When I get a decent supply of the supplements, and watch my intake of meats and proteins, and cut back on beer (expecially dark beers), I don't get flare-ups.
[url]http://www.drtheo.com/[/url]