I was bored, and using "Gaim" style in kopete when I got idea! Why not modify it a bit to look more like that the greatest irc-client, irssi! ;) Soo, here's some first results, hate it free, use it more free...
note: file is only style-file, copy it to ~/.kde/share/apps/kopete/styles/
added another file with bit different colours, try them both ;)