OK, this is the last one, I promise.

Mark Hinkle at the Linux Today Blog has some neat ways to use open source for your favorite cause (and mine): Green IT!

One example:

Use OSS Monitoring Software to Shutdown Idle Equipment--You would be surprised how many under or un-utilized pieces of equipment are left on for extended periods of time. You could use OSS software like Zenoss Core to discover devices on your network and use the auto-remediation feature to turn off servers, desktops and other equipment after being idle for a number of hours or days.

Here's the Zenoss Core page on SourceForge. Click here for the rest of the tips.