I'm using Magic Window, which is an animated desktop app. That can make it difficult to come up with a theme, since the desktop keeps changing. I'm using the standard weather and time scripts. The temp sensors are Temperature Monitor, and the Bowtie skin is Geektool (modified). The date and RAM geeklets I found here, but I can't seem to find the original pages I saw them on.
The second desktop is what it looks like if I'm not running Magic Window. It's my old standby. My font is Apple Garamond, which I've had since they accidentally included it on the OS 10.2 DVD.