Online collaborative whiteboard / drawing app for iPad I'm searching for a web-page + iPad app which I can use as a collaborative whiteboard.

Specifically I would like to draw on the iPad and share (in real-time) what's drawn on the web-page.

Any suggestions? The web-page must be free of charge, I don't mind paying for the iPad app.
Works GREAT: http://itunes.apple.com/us/app/air-sketch/id376617790?mt=8

Theres a lite version too.