RSAanimate rocks!!!
I don't know when I found out about these guys and their work, but I try to watch all their stuff. Here are my favorites so far.
The Secret Powers of Time[youtube=http://www.youtube.com/watch?v=A3oIiH7BLmg]Changing education paradigms
[youtube=http://www.youtube.com/watch?v=zDZFcDGpL4U]Crises of Capitalism
[youtube=http://www.youtube.com/watch?v=qOP2V_np2c0]