Talking of Outlook functionality, 80-20 have just come out with a new version of Retriever, a great search engine that integrates with Outlook (but also works from Word, Excel, Powerpoint, Internet Explorer, Windows Explorer, System Tray and Task Bar.)
Definitely worth a look. Also, the folks at IdeaLab have come up with a new beta version of their search product X1, which they seem pretty excited about. If you’re still looking for the perfect way to find stuff on your hard drive, give it a shot. There’s a free version which may or may not come with Adware; I haven’t checked what their policy is on this recently.