Mozilla just announced a design competition to develop "Firefox add-ons that turn the open Web into a rich learning environment."
As this is a subject that is very near and dear to my heart, I'd like to put together an IMD team and give it a shot. If you are interested, please contact me at jloganolson@gmail.com.
More info here: http://design-challenge.mozillalabs.com/jetpack-for-learning/index.html
FYI: The "jetpack" refers to a tool Mozilla just released that makes extension development more accessible to designers, but for the initial phase of this competition, all you need is a written pitch and mock-ups.
Let's do it!