Here are some pages that are new, or at least some are new to me. There are a lot more links on my old scoraigwind.com page.
A new arrival on the discussion board scene is anotherpower.com
Here is a Romanian web site for homebrew wind enthusiasts SIA electric offers a range of useful stuff including controllers that boost the voltage in low winds, allowing you to use a winding that has fewer turns and lower resistance.
For vertical axis fans in the USA here is a source of kits and parts
In the UK, V3 are offering parts of wind turbines, custom made and wind-turbine-supplies are offering all the bits and pieces you need to build my recipes.