http://www.apple.com/education/recycling/
Recycle your school’s old, unwanted Mac computers, PCs, and qualifying peripherals from any manufacturer — for free. There’s no purchase required, and all accredited K–12 and higher education institutions with at least 25 recyclable items are eligible to participate. Just register, before Sept. 2, 2011.
They accept all brands of the following equipment: computers, monitors, laptops, printers, fax machines, scanners, desktop-size copy machines, CD drives, hard drives, TVs, VCRs, projectors, overhead projectors, networking equipment, cables, keyboards, and mice.
You shrink-wrap the old equipment to a pallet, they send a truck to pick it up...Free!
We have done this several times with them and it is a very easy responsible way to get rid of all the old junk.
-Carolyn