Rio’s finally unveiled its new MP3 players. The one getting all the attention, naturally, is the Rio Karma (pictured at right), Rio’s 20GB competitor to the iPod. The Rio Karma has a couple of features that the iPod lacks, like support for the Ogg Vorbis open source audio format, a dock that comes with both an Ethernet port for hooking it up directly to a home network and RCA line-out jacks for connecting it to a stereo, and a battery life of 15 hours, almost twice that of the iPod. But while it’s shorter by 1.4 inches and lighter by a tenth of an ounce than the 15GB iPod, the Rio Karma is both thicker and wider than Apple’s player and so isn’t quite the iPod killer we’ve been waiting for.