Scriblink - Whiteboard and more

Thanks to Jane Hart for introducing me to a new whiteboard (sketching, scribbling, whatever you like) tool. Scriblink is totally free and also allows for text chat and long-distance telephone conference calling for yourself and up to five additional people who can view or contribute to your whiteboard drawing.

There are a few other features worth checking out, although this is NOT a fully tricked-out electronic whiteboard with all the imaginable bells and whistles. From what I've seen so far, I would say that this is a very useful, very free service that could be especially helpful for a teacher to demonstrate something to a student, for example during electronic office hours.