This is one of the nicer add-ons I've come across. Slick and useful comes to mind.
The add-on is designed by Sören Rinne, currently working on a Masters at Ruhr-University of Bochum and should get the Nobel Prize of Googleness for this one.
It's always nice when an app not only adds functionality but looks good too, and when just about nothing's missing.
Here's the scoop:
Like any of the Firefox add-ons, you can put this tool anywhere and the default set is shown below. Click the Settings button to add more Services and change the Display.
The choice of buttons is awesome and you should pretty much find everything you need.
You can also change the way the buttons display.
