Digital Global Network today announced its new Mac-compatible portable MP3 player, MPIO-DMK. The device, which is about the size of a key holder and weighs only 29 grams, offers either 64MB or 128MB of memory, USB support, and a backlit LCD displaying track information. The MPIO-DMK also comes with a belt-clip and arm-strap for easily wearing the device. The device is available now in both 64MB (US$179) and 128MB ($209) versions.