I'd make it "FAQ Index" too, just so the people would have an idea which index they're going to. I was going to say just "Index" but suddenly came up: Would the people know where exactly they'll be going? Well, if you have that index under a directory, and the visitor's the type that hovers on a link to see where he or she will be at, I guess that would be fine. But not all people who are spending their time on the Internet are doing that, right?
I'm all for Mike's suggestion here.