Small or Big Wind - How to decide?

I am in awe of wind power. I travel through Shelburne, Ontario periodically and the wind farm north of the town always takes my breath away. Although I'm interested in the large turbines, I see small wind as more of an opportunity. Our local Walmart has a small wind turbine that produces enough energy to light the store. I visited this week in silent support of their wind initiative as I prefer to shop elsewhere. While I shopped I came up with a list of things that I would consider in order to make decisions on wind energy:

Does it fit in my business?
What kind of equipment do I need?
How much does it cost?
What is the payback in my area? And more...

The Canadian Wind Energy Association (CanWEA) is one resource available to assist. See www.smallwindeenrgy.ca/en/SmallWind.html

The "acid test" was particularly interesting - it is a calculator that looks up wind performance and electricity rates in your area and examines performance of differenct sizes of turbines.

Do you have resources to share?