Now this is cool:
The MIT Media Lab's
Pengachu project, building a completely open-source/free, reusable, economical
Linux-based palmtop (with wireless networking, no less) for US$50.
These could be given to schoolkids or third-world villagers, or (as they
suggest) used to power robotic pets.
(Warning: JavaScript needed to view; apparently PowerPoint is too
brain-damaged to make standard HTML documents.)