Lots of good information. American Pet Association National humane organization, good articles, lost and found, vet finder Kyle Laird's Animal Rescue Resources Extensive list of animal rescue organizations and shelters. Lease With Pets Unique site that offers pet owners insurance policies to protect rental property against damage caused by pets. These policies give landlords a greater level of comfort about renting to pet owners, thus, hopefully, opening up more housing to pets. North Shore Animal League America Rescue group based in New York but sponsors nationwide efforts, such as Pet Adoptathon.
Group travels around and rescues animals from other shelters.
The Pet Channel Site does not deal with rescue but has lots of good articles on pet care, book reviews, chat with people from other sites. Used under License.