Do you have a picture online? He might just be trying to get a sense of what you look like and have said it without thinking, sometimes guys can be dumb like that without meaning anything by it or being jerks overall. I agree that it's in poor taste, but I wouldn't necessarily cut him off because of it if you like him otherwise. It may mean he's superficial, but I don't think it necessarily means that he only likes you for your body. Are you using match like Greeneyes and me? Let us know if you want any advice on your profile--I'm dying of curiousity now to see what everyone's are like!
How have your experiences with online dating been so far?