This is a set of Geeklets I use to monitor my system with just an exposé swipe and simultaneously keep my desktop feeling apple-y.
I tried to minimize the resources used in the shells, it ends up running 'top' in 2 and 5 second intervals, and 'ifconfig' every 10 seconds. The calendar was not written by me and can be found elsewhere on this site. All the other shells are pretty simple, even the CPU meter is just a while loop printing pipe "|" characters with some ANSI coloring. The IP addresses are LAN, not WAN, but will change to "INACTIVE" when that connection is, well... inactive. The backdrop for everything is actually put together from image files used in OSX's Dock.app package and you can get it by clicking on this thumbnail:
And if you're like me and got tired of the 3D glass dock, open a terminal session and run:
defaults write com.apple.dock no-glass -boolean YES; killall Dock
Now the dock should look like it does when it's on the side of the screen. (This can be reversed by entering the same thing but replacing YES with NO). If the layering order of the geeklets gets mixed up, it'll look pretty dumb. To fix this, right-click on the geeklets and choose "Send to back" or "Move forward" etc.
I think this setup looks pretty good with most of Snow Leopard's built-in desktops, especially the nature ones. Use it, change it, enjoy it, let me know how you like it!