fake, look at the camera lense on the front, it's distorted and doesn't match the perspective.
EDIT: And the dual colored text, apple wouldn't do that!
Nice mock ups, I like the white too. But 99% convinced it's fake. Apple wouldn't use multi-colored text, and "Three colors, three ways of life" just sounds lame and amateur. Apple is much more clever than that...
The lack of 2.0 firmware further reinforces that these are fakes. That being said, I wouldn't be disappointed if I end up being wrong. They look nice.
Here's the article they are form. I don't know what language it is in though.
http://www.iphonehellas.gr/1151/iphone-3g-leaked-photos-iphonehellas/
The language is Greek (as hinted to on their site by the flag and the name "hellas").
Fake. No new firmware. To be that thin there would need to be a massive gouge out of the top where the headphone jack goes...
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But the fake too thin. See reality.