The Blendermada material database has received an overhaul and is inviting new members.
Sergey Ozerov writes:
After 4 months of hard thinking I decided that old Blendermada conception was wrong. It's to hard to moderate every material sent to me. And I made some new features.
Now everybody can register and upload .blend file with material, and it will be automatically rendered and prepared for publishing. I made scenes for rendering and everybody can download it to test, how material will look after rendering. Right now it works only with Cycles, but soon I'm going to add Blender Internal support.
Also I made rating system, and everybody registered can rate materials.
Because of this I'm looking for new participants who want to join and become a part of Blendermada.