This, on Dr. Dog's site this morning:
"We recorded 4 songs this summer at our friend Brian McTear’s studio in Philadelphia and we’re real happy with how they came out. We of course just released an album a few months back and we’re not feeling particularly anxious to ask you for more money, so we’re just gonna give the songs up for FREE."
They will release the songs on a continual basis. Check out Dr. Dog's Facebook page (where you will be redirected to a sharing application) to download the songs as they become available.