Purpose: Have
you been addicted to XMMS to play your music files on your Linux
system? If you are and looking to continue to do that you might be well
prepared for a change in the way you have been using XMMS.  XMMS2, the
new version of XMMS, is completely re-written from scratch to support
the client-server model. It is a much more complex program (but still
simple to use) than what it use to be before. The purpose of this post
is to quickly explain how you can play music with XMMS2 without going
into the details of client-server model. If you wish to learn more
about it visit the XMMS2’s home page.

What got changed?

read more here