Nothing really aesthetically lovely here, but I like the wallpaper, which compensates for KDE's lousy weather applet - it's built with Imagemagick's compositing features. All of the other information is a bunch of grepping, catting stuff in /proc, and grabbing info from elsewhere. My router uses a Perl script to tail the iptables log and report hits on any LOG by port rules I have set up. This way I can watch people portscan me from all over the world. Anyway, it generates each hour on the hour, except for this shot, which I ran ad-hoc.
I think I am in the extreme minority in that I don't want a spare desktop. I want everything easily accessible, one click away. Accordingly, I run KDE with ludicrous use of toolbars. My only requirement is that I can fit 4 non-overlapping terminals on the screen, which I can. All that stuff on the right is emulated/virtualized machines I mess with.