Google Quick Search Like Quicksilver from Google

I've been working on an open source extension to allow this sort of functionality on firefox (all OSes). http://overstimulate.com/articles/search-results-in-firefox

If interested, the code is at http://github.com/anotherjesse/searchy - unfortunately the panel code for Firefox 3 is pretty crappy, and it is too easy to kill X11 responsiveness on linux. (firefox crashes with focus grabbed so you have to switch to another virtual console and kill firefox)