If you use Outlook for your email and contacts (and who doesn't) then I can heartily reccommend Lookout. It builds an index of your inboxes and contacts and then performs fast (and I mean *really* fast) searches of them. It uses similar search expressions as Google, so that you can esaily narrow your searches down and it seems to work like a dream. At the moment it is free, but when the time comes I'll be putting my 30 dollars into the pot....