I just came across these guys: http://www.brownbook.net/
They’re a sort of open yellow pages where anyone can add, edit or review businesses. This is very similar to what sites like WeLoveLocal and Yelp are already doing, but in a world where many small business owners have yet to really get to grips with online marketing, the analogy with something as familiar as the yellow pages could still be powerful.
BrownBook’s listings are currently mainly for the UK, but they are accepting entries from other parts of the world. Their revenue model is based on charging business owners to ‘claim’ their businesses. Looks like an interesting idea.