Open-source audio growing on P2P

News.com: CacheLogic has a new study out with interesting observations about file formats being traded through P2P...Among them is that while MP3 files still account for the bulk of audio swaps (about 68 percent), the open-source Ogg Vorbis format now accounts for 12 percent of music trading. This use is coming primarily in Asia, and primarily using the BitTorrent.