Slashdot readers (tm) support open standards: Ogg Vorbis, MP3, MPEG-4, FLAC.
Are you fucking kidding me? Half of your list is nowhere near "open standards". Maybe you think MP3 and MPEG-4 are "open" because you have software that can utilize them, but each of them has patent owners who would very much like to take you or the author of the software to court, for not paying the requisite licensing fees.