This is a link to a technique first described by Bahumat a while back for
enhancing the visual appeal of a Windows mud session. He lost his guide to
doing it in a hard drive crash, so I dug through my gigs of log files till I
found the method he discussed. The effect might be a little distracting for
party leaders, but might make life a lot nicer for bored party members. It
requires a recent version of Winamp and a fairly respectable processor to
handle the visualizations. This technique works best with a black mud
background with white or gray text.
http://megami.com/bat_bahumat_rainbow.php