This is pretty interesting stuff, but man it would have been nice if you were able to post it somewhere with actual HTML formatting. The gray on gray is tough after a full screen or two.
@-moz-document url-prefix(http://news.ycombinator.com/) {
td { color: #000000 !important; }
td.title a:visited { text-decoration: line-through !important; }
td.subtext { padding-bottom:2em !important; }
}