Based on its earlier Diablo and Bearaphim silicone rubber cases for second-generation iPod nanos, Boomwave's new devil and angel bear cases have been simplified from their prior versions. They still include distinctive ears and tails -- Diablo's devil-like, and Bearaphim's angelic -- but the cases no longer come with inked front graphics, differently-colored Click Wheel protectors, or biographical faux trading cards; now they're just sold with detachable…