A review of the Sony NWZ-B135F Walkman (2GB) player has been posted over at CNET. 'The Sony B-Series Walkman is slightly larger than your average thumbdrive, measuring 3.5 inches long by 0.8 inch wide by 0.5 inch thick, which makes it ultraportable and suitable for just about any pocket. It comes in a variety of colors--black, pink, red (2GB only), and blue (1GB only)--which align rather well with the typical gym clothing palette. The USB interface is concealed beneath a removable cap at one end of the device, while a standard 3.5mm headphone jack is bored into the other. The main playback controls sit on the face and consist of a play/pause button, track forward and reverse keys, and a back button. Sony includes a variety of dedicated controls on the top edge of the player, including a record key, a volume toggle, and a bass boost button. The necessary hold switch is housed alone on the bottom spine.'