This 2007 article by Mick Sagrillo and Ian Woofenden in Home Power magazine compares various models of small wind turbines.
Wind Turbine Buyer's Guide

There are many steps in putting together a small wind project. What follows is a basic outline of the major steps in planning a small wind project.

Wind monitoring equipment and software for wind resource assessment.

366 Summer Street
Somerville, MA 02144
(617) 776-8520

Second Wind website

Wind resource assessment technology and equipment

P.O. Box 0509
Hinesburg, VT 05461
(802) 482-2255

NRG Systems website

Apples and Oranges: Choosing a Home-Sized Wind Generator, by Mick Sagrillo is a good comparison of small turbine costs, construction, and performance from an industry expert.

Renew Wisconsin's Small Wind Toolbox is an excellent database of small wind turbine technical articles and forms for installing turbines in Wisconsin. It also includes a practical handbook that walks you through the steps of installing a small wind turbine.

The Database of State Incentives for Renewables and Efficiency (DSIRE) is a comprehensive database of incentives for wind and other forms of renewable energy. It is a great resource for up-to-date policy information.

This handbook was prepared by Windustry for the Illinois Institute for Rural Affairs at Western Illinois University in Macomb, Illinois and published January 1, 2004. The purpose of this handbook is to inform the reader about wind as a resource for generating electricity, with emphasis on Illinois as a potential host for small-scale and large-scale projects.