If you try to save it make sure you put in your QT tank first and treat it with copper...oh wait. I would contact your local Dept of Natural Resourses or find a wild life rehabilitator in your area and let the pros handle it.
awe... it's so cute. My uncle had 3 that he raised from finding them in his barn. I don't know if the fish and game commission will care about a baby squirrel. They will most likely tell you just to leave it there.
I'd monitor it for a couple to a few hours if you can to see if the mother comes for him, taking care to keep an eye out for cats or birds. A crow or hawk will make quick work of that thing if they see it. If not, then I'd consider it abandoned and take it to the wildlife center.