While I support the idea behind Vorbis, it's pretty much dead as far as I'm concerned. MP3 is transparent for most people at higher bitrates. Back when we used to measure flash device storage in megabytes and most people were on dialup, saving a few hundred kilobytes per file by using Vorbis at a lower bitrate was important. Now that flash storage is measured in gigabytes and broadband is widely available, most people just don't care about saving that now relatively minuscule amount of disk space. IMO, the window of opportunity for Vorbis to become a "mainstream" codec has come and gone, at least as long as CD audio is the "standard" audio format.
The fact that Vorbis is Free and MP3 is patent-encumbered is a non-issue for most people. They download an MP3, double click on it, and it plays, that's all they care about.