Comment 4 for bug 528910

Ryan: if I remember correctly the fluendo MP3 decoder is licensed by Fluendo, so there shouldn't be legal problems to play your music on Ubuntu (as long as you use a gstreamer player ;) ). Of course Vorbis is still technically superior, but...

According to https://wiki.ubuntu.com/UbuntuOne/MusicStore Canonical did ask for Vorbis & FLAC. Maybe both users asking for songs to be available in those formats as well as labels/artists providing the necessary files for that would help... (Ask your favourite artist?)

The reason for not using Amazon is also listed there: they don't sell downloadable music in most countries, seems like 7digital has at least a limited selection available (almost?) everywhere.

And of course Jamendo & Magnatune are and will remain part of Rhythmbox, no need to use U1MS to get good music... ;)

BTW: I'm sure music stores like 7digital would love to sell vorbis instead of mp3, as they have to pay 2% of their revenue on mp3 sales to the mp3 patent holders...