A few days ago, John Robb pointed to a new search tool: X1. Since I often misplace my files and email, this is my new favorite tool. I can search for filenames and file contents quickly, without having to wait for the slow little dog. It also has a preview window that will highlight your search terms and show you the contents of many common files.
The email search is much quicker and easier than Outlook. Overall, this is a great piece of software for people who are not quite as organized as they'd like to be (or people who have more files and emails than they can handle).
I give it two thumbs up.