Jawbone's Jamboxes may be the first gizmos that jump to mind if you're searching for wireless, on-the-go speakers, but they're not the only options out there. An outfit by the name of Braven has been teasing its own Bluetooth-enabled Six Series stereo noiseyboxes since April, and now it's officially ready to ship them off. Aside from pumping out wire-free audio, each unit can be used as a portable USB charger for your various gadgets. You'll have a choice between the aluminum-encased 600 ($150) and 650 ($190) models, while the 625 ($180) variant features a ruggedized, shock-absorbing enclosure and a water-proof bag fo