In the unlikely case that you have the viewer required for the object below you can play with fitting a power law distribution to the population statitics for various cities.
Update: Moved the plugin used below the fold. Sorry I’d forgotten how obnoxious some browsers are about coercing you into install such things.
It’s a little irritating to be prompted to install an activeX control everytime I go to planet apache. FYI
Sorry! I’m a dummy. I’ve moved it below the fold.