Jonathan, that's one of or more likely the best DIY turbine generator I've ever seen but I'm afraid my budget couldn't handle this project and put my skills to the test :).
I honestly thought about VAWT- there are some advantages of this kind of turbine- especially in urban turbulent winds. They are slower than HAVT so they require generator to kick at lower rpm, but without messing with some kind of reduction bigger dia generator (more magnets and coils thou) of your kind from previous post would perfectly do.
What do you think about VAWT Jonathan?