As a result, he's got the desktop you see above -- both tweets and iCal events sitting in a transparent pane on top of his desktop background. It will require a little Terminal tripping, but it's pretty easy to do. Just install and set up GeekTool the way you like it, and then make sure the buddy scripts are installed. From there, you can create a New Entry in GeekTool, and run whatever commands you want. It's incredibly flexible, too, because it'll put any Terminal commands you can throw at it right there on your desktop. If you're looking to fill in some of that unused Desktop space, give it a look.