Faughnan's Tech: Copernic/AOL: current leader in the sponsored (freebie) Windows desktop search race
I think Yahoo Desktop Search (X1 freebie) is the best PC desktop search tool -- except it doesn't index Eudora. X1 commercial does -- for $80. There was rumor of a Google Desktop Search plugin, but it's not there yet. So, for home, where I use Eudora still on my PC, I'm going to try Copernic 1.5 again.
Update to come.