Just heard about this business who recycle your cellphones and printer cartridges (in The U.S.A). Great service, good for the earth and a percentage is donated to charity. http://www.charitablerecycling.com/.
For our NZ bloggers, you can order return old ink cartridges to Warehouse Stationery. I use Ink Post who also can refill and recycle your cartridges.
Old cellphones can apparently be returned to Telecom or Vodaphone.