Okay, I got the pics uploaded, and I have more info.
http://img32.imageshack.us/i/4389j.jpg/
http://img34.imageshack.us/i/43911.jpg/
http://img36.imageshack.us/i/43921.jpg/
We are calling him 'Boo'. I took him to the vet for a quick look-see, and she said he's not chipped, and he's not fixed, and his teeth are in dire need of cleaning. She thinks he's about seven, but she wasn't sure. Except for being malnourished, he seems in pretty good shape. Very active, almost hyper. Does great in the car, and okay on leash(kind of hyper). He also got a bath and flea treatment from a very nice groomer who said he was very good about everything except being crated. He had a little aggression while in the crate.
We are going through BRAT to find him a home, hopefully soon.