TwitPaint let’s you express yourself in graffiti instead of just 140 characters. You can view samples of work done on the homepage or log in with your Twitter credentials to start creating your own.
Choose the brush width, opacity and color while working with your drawing. You then type a comment about your drawing and send it as a tweet. You must make the message around 100 characters to allow for the URL to fit before sending. Each brush stroke counted as a character when I did a sample.
You can view all your graffiti or everyone’s by language area before letting others in on the fun.
Your followers can remix and update your work by doing the same thing with a reply @you.
Peek at the site to see some of the creative work.