I would hardly classify myself as CSS expert - But it let me do what I wanted quickly. On HighTechTraveler.com - I'll let a hotel purchase a priority link and get a highlighted link. You can see an example by going to <http://www.hightechtraveler.com/cgi-bin/search.cgi?Brand=RAM> - In the CSS file, I wanted a tinted background on the upgraded links. So the default link has a priority of 9 and the others are 1-8.
table.priority9 {
background-color: white
}

table.priority8 {
background-color: #fffaf0
}

table.priority7 {
background-color: #fffacd
}

YMMV and I may ultimately change how I handle this as I build out the e-commerce side of the site.

- Tom Ransom