Any temperament testing...
What has it been exposed to...
What has it been eating...
Daily routine...
Crate training...
Good with kids, cats, other dogs...
Any people issues...
List of words used for the dog (ie, off instead of down)...
Favorite treats and toys...
Runner risk?
Fence jumping risk?
I like to do this thing for fosters:
http://www.volhard.com/uploads/drives-2010.pdf
Car manners...
Foreseeable transition issues (including diarrhea)....
I also like to have a couple of meetings with the adopter and the dog so that they can watch how the dog reacts to things and if I have a good method they can use it.