Seemingly designed as a direct competitor to the Jawbone Jambox, JBL's new Flip ($99) nails the price point that rivals have been aiming for, and features its own distinctive design. Capable of being laid down or stood upright on one edge, Flip arrives with twin front-facing speakers, a microphone for speakerphone use, Bluetooth streaming capabilities, and a five-hour rechargeable battery inside. It's typically JBL -- handsome and substantial-feeling…