GeekTool is a neat piece of Mac software that lets you stick any image (local or remote), any file, or the output of any command line into your desktop image. Here’s what my desktop looks like as a result (click for super-huge image):
From top-left down, you see the current The Old Farmer’s Almanac Webcam image, a graph of the load average on the Yankee webserver for the past 60 minutes, an MRTG graph of the bandwidth used at Peer1, where Yankee’s servers are hosted, and the current weather radar for Halifax.
Think “active desktop for the Mac” but less Microsofty, more geeky, and arguably much more lightweight and efficient.
Thanks to macosxhints.com for the pointer.