http://www.pocket-lint.com/review/59...-phone-review:
"we've already noticed that on the black model the edge has started to wear, revealing the shiny silver aluminium metal underneath the "slate" coloured coating and, indeed, we've witnessed it on two separate models, ruling out a fluke manufacturing error"
The reviews look really great, and coming from a current iPhone 4 user I could really use the upgrade. I really like the black slate model and think it looks sweet, but this kind of bothers me. There's no way I'm going with the white model either. I prefer not to use a case to add bulk, and my current iphone has never had such an issue either. However, who knows, maybe it will look better with the silver after wearing out all of the coating. Time will tell I guess. Great phone otherwise it seems.
EDIT: darkslide29 got to it before me, feels the same way