Replace xmms entry with something better

xmms is hardly a common Unix/KDE media player these days, I suggest replacing the xmms context menu entry with something better, for example Amarok. xdg-open would be more portable, but it doesn't take multiple files as arguments and may end up opening the files with kid3...

On the other hand, a "play" button somewhere would also be nice that would simply play back a file, perhaps using a similar widget as dolphin's file previews have.