Tonyo Rocco uses his body as a giant spirograph.

A web application from the guys of deviantART. I'm pretty sure I've seen this before somewhere in prototype form. In any case, it's pretty cool, and it's completely done in HTML5, which means that it works on any modern, standards-compliant browser... including the iPad. No Adobe Flash nor any other plugins required.

Pencil VS Camera: This artists overlays a hand drawn image on a real scene and takes a picture. Cool stuff.

Photos of every single page of the original manuscript for Lewis Carroll's Alice's Adventures Under Ground. Includes hand-drawn illustrations!

This online drawing tool is really, really pretty.