Hey guys, thought I'd post this publicly as well. This is a great little find that was actually shown off at SIGGRAPH 2001.

This site seems to server mostly as a showcase for the main resource; a technical paper on the 'CityEngine' techniques that this group that has supposedly been used to generate large scale city scapes. Goes into some details as to how they go about it to produce some of the cleaner details.

'Procedural Modeling of Cities' by Yoav I H Parish & Pascal M?šller. Both Switzerland natives.

Here is the site link!