Startup idea: a Wikipedia for small businesses?

I think this is a good idea for two reasons:

1. It's cheaper for businesses to start their own Business-pedia article than to pay for the development and hosting of their own website.

2. It may stand a chance of keeping a lot of the business spam postings out of the real Wikipedia, making it less work for admins to delete non-notable articles.

I would go to the site frequently, provided the ability to compare traits x,y and z of different "shops" within a specified area. This would be easy to do if you can find the right ways to structure the data.