I'm completely enamored with Odosketch!! Have you seen this amazingness yet?
It is a Flash based drawing template website. All you do - is draw!! If you create a login on the site you can save your drawings. If they like your drawing... they'll feature it on the front page of the site for others to "watch". You draw... and then watch what you've done. It's amazing. It's addicting. And also it is beautifully designed. The drawing tools are simple yet very effective in creating amazing works of sketchy art.
I have not created anything amazing as of yet... just silly stuff to play around with the tools...
I really suggest that you go and play - right now!