QUOTE (tarnalberry @ Feb 15 2008, 12:58 PM)

I stick to whole foods - fruits and vegetables can get you 30g of fiber (soluble and insoluble) a day more easily than it may seem. But things like flax meal, nuts, and some of the gluten free whole grains (like quinoa and amaranth) can help. (I have quinoa flakes with flax meal on top for breakfast - I can make it at work - now there's fiber for ya!)
As for supplements, I believe psyllium is gluten free?
Oh yes! I can't believe I forgot the grains
Amaranth is very high in fiber, and t'eff is even higher. Quinoa however, is fairly low compared to many I've looked at, including millet and buckwheat.
Here's how some grains compare in fiber content (1/4 cup of grain)
Teff 12g
Amaranth 7.4g
Buckwheat 4.2
Millet 4.2g
Quinoa 2.5g
Another thing to consider though, is the protein and carb content. T'eff is also the grain with the most protein of those listed above.
Don't forget rice, though there are so many varieties, I'm not going to try to dig up all the info ATM.