The 2008 version of Jawbone preserves the unique shape and general styling of its predecessor, using a gently curved black, mostly glossy plastic body that in no way looks geeky or sci-fi. Whereas the prior 2.2"-long Jawbone was quite wide by the standards of its competitors - 0.9” versus 0.4” for Apple’s iPhone Bluetooth Headset—and not capable of being worn without a supporting earloop, the new 2.0"-long by 0.5"-wide version…