Keyspan announced today that it is now shipping retractable USB charging cables for several popular mobile phones. The cables allow a cell phone to be charged from the USB port of a Mac or PC, and are designed for use with Nokia, Motorola, Ericsson, Siemens, Sony, Samsung, LG Mobile, Sanyo, and Kyocera phones. Pricing for the cables ranges from US$21.99 to $29.99.