You have had a lot of great feedback with this message thread – I would like to add my favorite to the suggestions. Any group that receives your quilts will be thrilled, I’m sure.
I am a member of the Sunshine Quilter's Online Guild (a yahoo group). We make quilts for kids around the world. We work through two programs: Wrap a Smile and Wrap Them in Love. Quilts go to kids undergoing cleft palate surgery and to children in orphanages worldwide.
Here is a link that describes Wrap-a-Smile:
http://www.wellsrotary.org/Wrap-A-Smile.cfm
And here is a link that describes Wrap Them in Love:
http://www.wraptheminlove.org/
You do not have to be a member of Sunshine to donate quilts to these organizations, I just like the group a lot.