A Space-face is a person that looks better on Myspace than they do in person. The person usually takes angled photographs when the lighting is just right to make them look their best and they almost never take photos from the waste down.
For Guys: "I met up with this girl at a bar that I know from Myspace. She was a total Space-face. I hit it anyway though."
For Girls: "I can't believe Josh left me for her, she's such a Space-face."