Current drawing apps aren't too popular as they're not accessible to the host of many devices people use, chatting's not versatile or user-friendly enough to compete with chat sites, and their designs look god-awful like it's still the 90's. So with what we're after, there's insane potential in this project.
This is the interface. I hope it gives you some sense of what we're aspiring for. It's predominantly JS, HTML, and CSS with server-client communication in HTML5's WebSockets, and some points in PHP. If you're good with any of these, message me here, Skype drawplanet or email email@example.com. I'll be more than happy to answer any questions. And if you're critical of anything, nothing's set in stone. It's very much a by the community, for the community type of project.
Also on the hunt for people good with P2P networking, node.js, SQL, or server management.