theLearnia is a virtual whiteboard that allows you to record video lessons using your voice while interacting with the whiteboard (write, draw, insert images). It even allows you to import your PPT presentation and convert it to a video lesson.
Via Becky Roehrs
the Learnia is now in beta: it looks like it could be an excellent tool-you can do many of the basic tasks you can in OfficeMix, without a complicated logon system to navigate.