Rounded Corners with CSS

CSS Round Corners - Ben Ogle's blog. Yeah!
Good examples, shows how to make a color section for the heading, and shows how to do a thin border on the outside of the rounded corner.

Rounded Corner Generator - CSS Portal
This code is a little bit longer, because the classes are named "rnd_b1" instead of "b1, b2"

It will be much better once Internet Explorer supports the border-radius property in CSS3 as Firefox and Safari do.