a search engine called A9.com
It includes not only the usual search the web functions, but also quite a few other cool things, like an integrated version of their "Search inside the Book" feature.
As one can imagine, the blogosphere is already buzzing about this - big time ! John Battelle's Searchblog, for example, has 1, 2, 3 interesting postings concerning A9...
Btw, I am still waiting for a Mac OS version of one of these toolbars everybody is offering these days !?