Yahoo Desktop search is elegant. It’s not perfect, but it’s very quick, and has important advantages over Google’s. It doesn’t rely on IE; it can be tweaked to search openoffice files and display their context in plain text — actually more useful than the formatted display of word files; I cna have it search my browser cache if I want. It might search Opera email, but there’s no need, since the whole point of Opera as an email client is its searching and indexing. YDS has, however, indexed all my old mail archives from the Bat, which is something I have wanted for ages.
Against this, the actual search interface is ugly and unintuitive. The indexing is intrusive and chews up CPU time. The indexes are gigantic. But none of these things matter very much beside its virtues. I can learn the interface, and like anyone else who had bought a PC in the last three years, I have more disk space and CPU cycles than I can exhaust.