Continuing the huge flood of cases we saw last week from XtremeMac for the iPhone 4 are Hybrid ($35) and Leather Case ($35), two twin-material designs that are similar to one another in dimensions. Hybrid combines a silicone rubber outer shell with a clear hard plastic inner frame that shines through geometric holes in the opaque rubber; Leather Case is substantially made from black plastic but has a less than thrillingly stitched leather piece as…
