I've used talcum powder several times quite successfully, and next time will definitely try to dampen the fabric a tiny bit. The only problem I had with the talcum powder was how quickly it disappeared under my hands when I was quilting.
I use a little box of Avon talc which has been hanging around my house for quite a while, with a small piece of sponge to apply it. I wash the quilt immediately on finishing it, and the talc disappears completely. Quite a good, economical solution, in my opinion.