Everyone has their own bias to anything they post. I don't agree 100% with any of the links below, but I think they are a good place to start.
The curl chemist articles. Link posted above.
The Beauty Brains
THE NATURAL HAVEN
Live Curly Live Free - Home
Blogs written by curl talk posters that have good information.
science-y hair blog
(a blog to help new wavies, go to the how do I get started page)
2a (nc.com) 2bFi (Fia), very fine, thin, low/normal elasticity, porous, CG, doesn't get weighed down
Cowash: Tresemme naturals
Rinse out/leave in: Renpure Organics (red)
Curl enhancer: FSG
Gel: BRHG, Salon care aloe, Ecostyler Krystal (normal dews)
PT: ION effective care, IAgirl's gelatin PT
Low Poo: renpure (red), Ion swimmers