Like earlier Feather cases for iPods, iPhones, and iPads, Incipio's Feather for iPhone 4 ($25) is a hard plastic shell with soft touch rubber coating for an anti-slip texture, or as a new alternative, a pearl finish if you prefer. Feather's designed to provide rear protection and a little side protection for users with minimal coverage needs. Twin film screen protectors are included in the package, along with a cleaning cloth and applicator card;…