Howdy,
I thought folks here in Embedded Desgin would enjoy the element14 Great Global Hackerspace Challenge in motion:
http://www.element14.com/community/blogs/pdp7/2011/05/05/hackerspace-challenge-in-motion
These wonderful project demo videos show what can be done with a microcontroller, a portable power source & a large dose of creativity.
Cheers,
Drew