In some cases, it'd be easier to follow the contents of long tables if there were a rollover effect for the active row. It is still a good portion eye candy, though I think it does help with usability.
Below is an illustration of the effect with some arbitrary colors using the CSS that vBulletin uses.
Code:
div.KonaBody > table.tborder > tbody > tr:hover > td.alt1 {
transition-timing-function: ease;
background-color: #ccc;
}
div.KonaBody > table.tborder > tbody > tr:hover > td.alt2 {
transition-timing-function: ease;
background-color: #aac;
}
It's sad, typographic markup rather than nice, structural markup because of the sad choices vBulletin uses for element classes. But it does identify just the desired elements.