Neat collaborative project by a group of awesome cartoon artists which requires active participation from the viewers. You ask for a doodle, they add it to the collage (even The King of Rock-n-Roll made an appearance ). Then you can view all the little pieces in great detail by moving the interactive loupe over the whole thing

The Great Collaborators include…
Ryan Terry
Britt Spencer
Dave Montes
… and their individual sites/portfolios/blogs certainly deserve your doodle-loving attention.