Welcome to GP! You can find many "free" dogs needing homes too. But be prepared, just because the dog is free, doesn't mean he won't cost you money on vet bills, etc...
Here is one I found in the NH area :
http://nh.craigslist.org/pet/88670436.html
And another in MA:
http://boston.craigslist.org/pet/90990593.html
And another:
http://boston.craigslist.org/pet/90850942.html
And another:
http://boston.craigslist.org/pet/90693619.html
Anyway, check out craigslist.org and look in the pets section. These animals needs homes as well as they'll probably end up in the pound if they aren't homed.
You can also check petfinder.com in the classified ads
http://www.petfinder.com/post/classifiedhop.html for people needing to re-home their pets.
Hope that helps and glad to see you're on a forum to learn about dogs, etc.
Hope you stick around. We'd love to see pics of your new family member when you get him/her.