Update: Nadir has been adopted!
Nadir is a lovely dog - mostly white, with some interesting tan markings.
He is very sweet-tempered, and maybe a little bit shy (though it didn't seem to take very long before he was willing to trust me when I had him out.) He is a velcro-dog in the making: he was definitely eager to stay as close to me as possible, even when I removed his leash. He did explore the yard a little, but I could tell that he was keeping a close watch on me to make sure that I didn't run away!
He is a leaner and once I sat down, he came over and put his head in my lap and just closed his eyes, enjoying his ear rub.
I remembered that I had some treats down in my car, so I walked him there and gave him a few. He really enjoyed them! He was more than willing to take whatever treats I had for him, and looked a little disappointed when I tossed the bag back into my car! In fact, he tried to climb into the front seat of my car after that.
Nadir will be a great dog for someone - he seems to be that perfect combination of calm, eager-to-please, and happy to be with people.
Oh, and curious. He finally succumbed to the desire to know what the "clicky box" in my hand was.