OK, so far this is what I can tell:
Dobby sniffs other dogs and seems to not mind them sniffing him. Walked him past about 10 this morning at Grand Army Plaza on the way to the vet with no trouble. Not even a bark.
Dobby seems blissfully ignorant of the existance of cats, although there is one about 30 feet away right now. He's not sniffing the door or anything.
Dobby is definitely house trained. He scratched to pee about 15 minutes ago.
Dobby walks very well on a leash, although the couple miles we were doing seemed to make his pads cold (perhaps some residual frostbite from last night) so he stopped and sat and lifted his paw in the air until I rubbed it for him.
Dobby is heavy, but I wouldn't think he would mind being lifted.
Dobby definitely knows how to sit. In fact, he knows stay and "out" as well. He picked up a tumble-weave this morning that needed to go.
Haven't yet tried to fetch, although he did enjoy carrying a stick on the walk down Union Street.