It will take a while before large numbers of people see the light drop MP3 in favour of OGG.

If MusicMatch would get a move on and bring out a version with ogg support that would help. For the moment you have use a different player like
http://www.ashampoo.com/products/0014/
and a separate CD ripper like
http://www.cdex.n3.net/
which encodes OGG as instructed inspite of having MP3 emblazened over the "go" button.

We can all do our little bit to encourage others:
Share more OGG files and less MP3 files.