I LOVE dyeing my own fabrics, used to be every quilt i made had at least a little bit of my own dyed fabric in it...i have not dyed any since we moved to our new house 3 years ago (or was it 4? boy time flies) anyway...i have run out of most of my supplies and kind'a had the itch to get busy and do some dyeing; lucky me a lqs is having a dyeing class in a couple weeks. i can go dye to my hearts content and don't have to spend a bunch on stocking up yet.
if you have never dyed fabrics before try to find a class somewhere to give it a try, it is rather costly to get started (of course once you do purchase the dyes and soda ash it does go a long way. I do believe Dharma still carries (beginners) starting kits, you could try one of those without putting too much into it, could even try batik-ing your own, the starter batik kit is pretty sweet, we had lots of fun with that.
i do recommend a class though if you can find one.