One of my main beefs with Apple's Safari browser has been that its search box is totally pathetic. It only supports one search engine and, well.. that's it. Inquisitor, however, changes all of that in the most attractive of ways. Check out the screenshot. I have Wikipedia, IMDB, and all sorts on mine now.

I currently flip-flop between browsers at the drop of a hat. Firefox 2.0 on the Mac is incredibly good, but Safari still has a slight edge on type quality and responsiveness. It's getting harder to say which is better though.