MacZot is having their latest Blogzot for the Spotlight alternative "HoudahSpot". I gave HoudahSpot a quick spin and found that it has some interesting search alternatives absent from Spotlight, and a unique set of tabbed windows (Browser, Inspector, and Preview) you can switch between to view files. I especially like the Browser window, which allows you a quick view of any standard text or graphic file. Give it a try, as the demo version allows you 30 free search queries.
NOTE: If you're seeing this on June 16, 2006 head over to MacZOT, you might be able to get a Free copy of HoudahSpot
Search easily in Tiger, Mac OS X, with HoudahSpot