Disclaimer: This toolbar will certainly break your firefox and your computer and probably cause emotional distress to you and your family. That being said, please also note that this toolbar emphasizes my lack of graphical ability.
I very quickly whipped up this tool bar to make navigating around Gentoo a bit easier for myself. The first four icons will search for whatever you type into the drop down from the main url, bugzilla, forums or planet.
The second set of four icons will take your directly the sites home pages.
Install link: gentootb.xpi