Eastern Ratsnake (Pantherophis alleghaniensis) aka Black Rat Snake - 4/24/10 WWW4 in VA - When you see a snake with blue eyes, like this one, it means it will be shedding its skin soon.

This snake has weak keels
http://www.virginiaherpetologicalsociety.com/reptiles/snakes/eastern-ratsnake/blackrat_snake.php
shedding signs:
http://exoticpets.about.com/od/snakes/qt/snakeshsigns.htm