I don't know if you guys have played with this thing yet, but as someone who is heavy into 3D as a hobby, you have to give this a shot.
Sketchup is a 3D architecture visualization tool that Google bought to make assets in Google Earth. The application is free and the program itself is crazy-simple to use. You can also make anything with it, Houses are the easiest, but it can be extended to pretty much any building, or anything really. I've even started to draw out Balumb Garden using the Photosnap tool (Oh god, I'm such a nerd!) and it's completely fantastic.
It can be a mindless timewaster if you don't watch it.
You can get Sketchup here
However, the tutorial to use it you can get for free online. There is even a free "for dummies" series
. It starts at Chapter 2, but just follow along. It only took me a day to learn.
Have you guys tried it? What do you think?