It's rather old video, I'm sure there are newer versions.
http://www.youtube.com/watch?v=rpTT6sj6Xmo

Hmm, hope they didn't get sued for this ;)

Check this as well, it's ever older thread than the video.
http://ubuntuforums.org/showthread.php?t=30434
and here:
http://linuxhelp.blogspot.com/2005/12/kompose-macos-expose-on-linux.html#axzz0diQtaAqU

@jacadcaps
So, judging from what you say it's doable. Maybe some day... ;) I look forward to it.