We really like how in the Batman Movie, the Bat symbol is displayed in the spotlight. Really cool. So, we decided to emulate the spotlight with the Apple Logo using PhotoShop on a Cityscape background. Here are the tools we used to tweak the background:
For the time in the top right corner, we used the Gorgy Clock Yahoo Widget.

For the CPU, RAM, and UPTIME, we used GeekTool:
RAM:
top -l 1 | awk '/PhysMem/ {print "" $8 " "}' ;


CPU:
top -l 2 | awk '/CPU usage/ && NR > 5 {print $12, $13}'

UPTIME:
uptime | awk '{print "" $3 " " $4 " " $5 }' | sed -e 's/.$//g';
For the calendar, we used Dateline.
The font used in GeekTool and DateLine Calendar is Eurostile Regular.

Here is a download of the wallpaper (without my desktop screen) for all the Batman and Mac fans out there.

The size is 1,900 x 1,200