Long time listener, first time caller here.
I cobbled this together in about 5 minutes to make it a bit more work friendly (no avatars, more greys, no header). Use as you wish. Firefox and Opera friendly if you know how to do it. Remove img[class*="avatar"] line if you want to restore avatars.
@namespace url(http://www.w3.org/1999/xhtml);
@-moz-document domain("www.evilbore.com") {
img[class*="avatar"] {display:none !important;}
.topbar {display:none !important;}
.hrcolor {background: #DDD !important;}
.windowbg3 {background: #DDD !important;}
.windowbg2 {background: #EEE !important; font-size:11px !important;}
.windowbg {background: white !important;}
.quote {border-color: #ccc !important; background: #EEE !important; padding:5px !important; margin-top: 5px !important; margin-bottom: 5px !important; font-size: 10px !important;}
td.mainstrip, td.mainstrip_first, td.mainstrip_last {background: none !important;}
td.mainstrip a {padding: 5px !important; color:#BBB !important; text-decoration: none !important;}
span[id*="msg_"] {font-size: 11px !important;}
}