I've added to new bits of software to my computer setup. iEx is an app that somewhat replicates Apple's Expose feature. After using the G5 in the lab here for a day, I grew to like that feature rather quickly, especially now that I don't have a three monitor setup. iEx doesn't have all the whizbang animations of Expose, but it has the necessary functionality.

I'm also testing out Samurize, which lets you place a lot of useful information on your desktop, like a CPU meter, network meters, weather, battery gauge, etc... (its different from Konfabulator in that you basically have one giant widget that you customize, instead of a bunch of little ones). The screenshots might make it a little bit more clear. The learning curve is probably a bit steep for beginners, but once it's runing it's rather nice.