There wasn't a shortage of unique small wind turbine designs at AWEA's WINDPOWER conference last week in Chicago. Here are a few I came across - some are from what appears to be newer wind companies, while others are more established (to learn about more conventional turbine designs, see Tim Hurst's Top 5 Micro Wind Turbines).
HelixWind's vertical access turbine:
A company called Mecaro created this Spiral Magnus wind turbine:
Chicago's own Aerotecure International created this turbine style, which has been installed on buildings in the Chicago area, as well as in California, New Jersey and New York.
A company called Tangarie designs this patriotic turbine: