Here's a specific place looking for such donations:
http://www.volunteersolutions.org/uw.../20702718.html and another
http://www.volunteersolutions.org/uw.../15462324.html
I'm not trying to rain on anybody's parade but I'm pretty sure I've heard of an organization doing this but I can't find it with a simple search. No reason multiple people can't do it, but you might want to see if anybody else is and how they do it.