Steve Makofsky noticed that Lookout is available from the Microsoft Download Center. If you're an Outlook user, run, don't walk to get this thing. It has saved me at least an hour a day since I started using it. Here's some info and a link:
Lookout
Lookout is lightning-fast search for your email, files, and desktop integrated with Microsoft Outlook. Built on top of a powerful search engine, Lookout is the only personal search engine that can search all of your email from directly within Outlook - in seconds...