Was going for White but.....black really looks sharp on the iPhone4. I would have waited but heck its gonna be "later this summer" b4 some get the black ones!
When I first saw the leaked photos of the white iphones, I almost had a heart attack and swore to get the white ones but seeing more and more leaked photos and promo shots made me realize that the white color sort of diffuses the silhouettes of the new iphone and makes it look more round-y(?). On the other hand, the black ones, as you put it, look very sharp and edgy at any angle you look at it. (360 view from Apple website)
I'm happy to see Apple going back to their tradition and reintroduce white color in their line up but for this particular design I think black suits better than the white. Of course I don't know how exactly I'd feel once I see the real unit on my hand but I don't think I'll regret getting the black. The only thing that worries me is the finger prints but hopefully it's easily wipe-able.