IE 7

I think that the one major improvement that is not being talked about very much with IE7 is the improved support for printing: the ability to adjust margins within the print-preview, the ability to easily hide/customize the header and footer, and the shrink-to-fit option. Many people, especially in a business environment, print out all kinds of pages. The improved printing is a small change that can be a big timesaver. As for the RSS integration, both IE7 and Firefox 2 leave alot to be desired. This is one of the areas that both browsers need to improve on.