As I continue with things I will get around to a couple of tutorial bits and pieces.... you know.... eventually!
In the meantime, you can check the threads I started at Polycount and Zbrush Central as I explain a lot of my workflow there and offer a few tips.
Unreal Tournament 3 Thread at Polycount
Gears of War 2 Thread at Polycount
Gears of War 2 Thread at Zbrush Central
Below are the slides I made for my talk at ECGC
Modular Environment Design
Or how I learned to stop worrying and love the grid