Don't worry, I was being facetious. I know there's good reasons for using mp3.
Well, one good reason anyway.... The one you said.
Mpeg 2 layer 3 may also be .mp3 but it doesn't mean all mp3 playing devices support it.
If it's all right with Matthew, then anyone wanting software features is free to email me about them, but I can't promise I'll be able to implement them!