A few folks have murmured that they would enjoy giving/getting c/c on these boards, so I thought I'd suggest that folks who want c/c could first upload their images to the gallery, and then embed the image in a post on these forums for critique.
I've borrowed (or rather, plagiarized with consent), a c/c sytem from an art community where I pretty much learned how to draw, and
posted it as a sticky topic. If you want to read it over it'll give you some ideas on how to go about getting the kind of feedback you want.