Cartography Shop Tutorials? or for that case, any BSP modelling?

Does anyone know of any good Cartography Shop Tutorials. After much investigation into which DIF modeller I should use (Quark, Hammer, Worldcraft, Gamestudio), I finally settled on CS4.1. With the Torque Pipeline for CS by Tom, I think this is the best option (at least for me). And from what I've heard about the upcoming CS5, I think investing on this product would be well worth it!

Even if you guys know of any good BSP modelling website (quark, hammer, whatever related), I guess that would suffice to. It's all about the CONVEX techniques anyways right? think outside the CONCAVE :)

thanks