This afternoon Yahoo posted word that they’ve released an update for their desktop search tool. You’ll now find support for Thunderbird e-mail along with what Yahoo calls a “simplified” user interface.
The initial download of YDS has also been made smaller and faster by “splitting out support for less common file types” and placing them into an “expansion pack” that’s available here. Overall, Yahoo can index and search more than 300 file formats.
More info via the Yahoo Search Blog. Yahoo’s own Jeremy Zawodny has posted some comments.