Yahoo! jumped into the desktop search this week with Yahoo! Desktop Search Beta . I think it’s a re-wrapped version of X1 Technologies search tool. Overall I find it more useful than Google’s , since I get all my files (Google only does some files) and the preview feature it nice. Yahoo! is probably on par with Microsoft’s offering , but MS does integrate well with the desktop.
Either way, now I can find those long-lost files (currently I have 302,933 files in my Y!DesktopSearch index).