Not enough people on this site are aware of the program that is available due to Sciboy. Sketcher is a very cool java based program used to draw in real time with other artists. What makes it unique from other web drawing sites, is that it allows for pressure sensitivity for tablet users.
Whether you know of the site or not, I feel not enough people are using it for the money that it costs to keep it running.
Its easy to use and easy to set up. You just need Sun Java and JTablet found here (http://www.cellosoft.com/sketchstudio/)
Please take some time to look at it if you haven't already, cause I need someone to draw with!