RealtimeBoard is a new online whiteboard that seems like a decent tool for real-time collaboration. It’s easy to use, and lets you upload images from your computer or by its url address.
I’m adding it to The Best Online Tools For Real-Time Collaboration.
I’d add it to The Best Online Virtual “Corkboards” (or “Bulletin Boards”) but, even though you can make your board “public,” that appears to mean that only registered users of the site can see it. If you could make the board public to everyone — registered and non registered users alike — then RealtimeBoard could really be a multi-use tool for teachers and students.