For anyone local to the Bay Area, there's an InstallFest tomorrow in 4 locations - San Francisco, Berkeley, San Mateo, and Marin. They donate open source computers to Northern California schools, on recycled hardware from the Alameda County Computer Resource Center.
If you show up, you can help disassemble computers for recycling, or install Ubuntu (it is not hard!) and prepare the computers for donation to schools.
With a little more advance notice we could pull together some Woolfcampers or Blogheristas in force for one of these things!