Kristy,
I use a product called "Caphosol". (www.caphosol.com) At least I can get 4 or more hours of sleep without having to wake up and get my tongue unstuck from the roof of my mouth. I still drink a lot of water during the day and pee a lot but don't take the caphosol during the day. It does not burn at all but it is not cheap. I finished chemo/rad 9/17/07 and have hot spots on my tongue where almost everything burns also. Hope this helps.

Bruce (SCC Base of the tongue, Stage 3)