I just wanted to remind everyone that Microsoft's offer to download Outlook 98 for free ends June 30th, so if you want to grab what I consider to be the best email client out there (yes, it's huge, and yes, there is way too much in there, but still...), then you've only got a short time to get it for free. Existing Office 97 or Outlook 97 customers will, however, be able to upgrade to Outlook 98 for free indefinitely.
For more information, visit the Outlook home page.
You can download Outlook 98 directly from the Microsoft Web site as well. Be sure to download it to the machine you are installing Outlook 98 on.