Shoutbox

Message Customizer! Live is nothing like what you want (I know, I wrote it).  Rainbows are very difficult and I think the way you are doing it is a good way.  There is nothing made at the moment to do it better to the best of my knowledge.  The only thing a script could do to make it better is to be able to equally space it all, but really I don't think it is worth the effort of making the script.