I just heard from Make Magazine that they have a fancy new dynamic collaborative projects database called Make: Projects! These projects allow people to interact and improve them over time.
The website is in Beta testing, but already loaded with projects to build, hack, tweak, share, and discover. And be sure to check out the two featured by yours truly just in time for hole-y sweater weather - felted sweater potholder and felted sweater scarf.
image courtesy Make Magazine