The Fresh Air Fund
The Fresh Air Fund, a non-profit agency, is looking for volunteers to serve as a host families for inner-city children this summer. They are particularly in need of host families for August. The goal of the Fresh Air Fund is to provide summer vacation experiences for children from low-income communities in New York City. These are children who otherwise might not be able to have the experience of lazing around by a lake-shore, playing on the beach, or taking a trek through the woods. If you are interested (and live in New England or Virigina), please check out their website here.
* I am not receiving any payment to advertise this agency. Just in case you were wondering.

Sounds like a great organization.