We've seen a lot of iPhone 4 cases here at TUAW. Most thin polycarbonate or TPU cases are pretty much the same -- brute force them on to cover the back and sides. Graft Concepts have taken the thin-polycarbonate case form factor and added something a little different with a top locking latch.
Thanks to the Graft Concepts team, we got our hands on a pre-production black and chrome version of their slick looking iPhone 4 case to put through its paces.
