Build your own home coffee roaster

Here, and here are two places that explain how to build your own coffee roaster.
In order to roast your own coffee, you have to start with green beans. Green coffee beans of course... not haricots verts. I guess that Sweet Maria's is a good place to get those.

I might try the lo-tech method of roasting the beans in a wok. That's worked for nuts that I've toasted. Or, maybe just go to Stumptown annex.