I don't foster, I would, but my parents don't want anymoer dogs in this house! Although, I found all these sites for you. They're located in Indiana, the Great Dane rescues are first:

http://www.greatdanerescueinc.com/
http://www.greatdanerescueinc.com/rescuesbystate.html
http://www.ohiodanerescue.com/
http://adopt-a-great-dane.1-800-save-a-pet.com/
http://www.dogs-central.com/dogs-pup...s-rescues.html
http://www.barkbytes.com/rescue/grtdan.htm
http://www.danesonline.com/resources/dane-rescue-1.html
http://directory.google.com/Top/Recr..._and_Shelters/
http://www.gdca.org/donations/rescuedon.htm

Huskies:
http://www.huskyrescue.org/
http://adopt-a-husky.1-800-save-a-pet.com/
http://www.everythinghusky.com/rescue.html
http://www.1-800-save-a-pet.com/shelterpages/70060.html
http://www.siberianrescue.com/midwestdetails.htm
http://www.sos-srf.org/Rescue2004.html
http://indyhomesforhuskies.com/RP_WebDoc.asp?ttid=52

Hope I could help you out a bit!

Have you ever thought of fostering for your local shelter? I'm sure they have Huskies and Great Danes every once and a while