Not a Geeklet, but an interesting tip that was posted today over on :
To turn on anti-aliasing in GeekTool widgets, go to the font preferences for the widget and, if you can't see it already, resize the font window so that you can see the shadow sliders. Click the shadow button (the button right before the sliders) and then set the opacity to as close to 0 as it will go, but not 0. Just a pixel above. Then set the other two sliders to 0. This will cause Mac OS X to force antialiasing on your widgets, even though GeekTool doesn't support it out of the box.
