The Microsoft Money Insider web site contains several retirment planning calculators with some interesting performance support features. The following screen shot shows one of the calculators. As you click on or tab to each field the help frame on the right side of the window will display help for the field.

To view the calculators on the Money Insider web site, click the "Retirement" link on the site's home page. Scroll down the retirement page to see the link to the calculators.