For example, see the MySQL website. It's only going to be used to rotate through about 3-5 "ads" to noteworthy areas of the site. I'd like to have some kind of link control to backtrack to the other content (again, like the MySQL site). Google gives me a bunch of very easy to implement stuff for the rotation itself, it's the link control that is difficult.
I found the cycle plug-in for jQuery to be very versatile. It can rotate elements in several ways and can add a next / prev control menu.