Outlook 2003 is great! For one, it automatically connects over http to our Exchange server w/o any problems (bye, bye VPN). Didn't even have to set up anything, it automatically determined everything from the server name when I was adding the account. Additionally, the UI is a ton more responsive and there are a ton of really slick new features (like notifications that let you preview the text of incoming messages and preform actions on them w/o opening Outlook...very nice to be able to delete spam right away). Definately worth the upgrade.