step-by-step collaboration
Instructables is a community for:
Showing what you make and how others can make it
Being inspired and learning how to make things
Collaborating on projects you are interested in
http://www.instructables.com/
Neat site...
It reminded me of Howtoons... But when I went there it looks like your site ate my site! :P
http://www.instructables.com/howtoons/