Another cool tool (though it isn't the Cat's Meow!) is an auditing add-in I found yesterday. Go to http://vangelder.orcon.net.nz/
go to his Excel page (using the bar on the left) and look for "AudXL 1.10 Add-In." I dont like the way it formats formulas, but it's a cool idea and has given me some of my own. Excel is extremely powerful, a cheaper replacement than MatLab in any event!
Incidentally, if anyone is tired of the Excel sort order I am almost finished with a module that does a natural sort in excel. It can also sort by cell or font color and allows more than four columns (no real limit...). Let me know,