My absolute favorite is Curl Junkie's Gentle Cleansing Shampoo. I've used shampoos from Shea Moisture, Kinky Curly, and Jessicurl, and for me, CJ beats them all.
Sulfate/non-water-soluble silicone free since 8/16/10
Northern VA
Med-coarse, normal porosity, low elasticity
Dye-free since 11/2010