I just downloaded the program and I’ve only been using it for a day, but Konfabulator looks like a pretty useful program. Basically, it’s a program that “lets you run little files called Widgets that can do pretty much whatever you want them to. Widgets can be alarm clocks, calculators, can tell you your WiFi signal strength, will fetch the latest stock quotes for your preferred symbols, and even give your current local weather.” It’s free now (thanks to Yahoo), so check it out.
If you use Konfabulator, let me know what widgets you have and why. I’m trying to figure out more uses for it.