One more effective method to advertise your business is getting it listed on yellowpages. However, if you would like to update your business contact details or address, it can be hard to do it if it's in a printed yellowpages book. Online YellowPages are becoming more and more popular because of this dilemma and just because Internet has become one of the most accessible marketing media available.

So-U-No (pronounced as "so you know") is one business directory that comes to the rescue for business advertisers that are needing to make their biz get known easily. It sports an easy-to-use interface which allows users to search using three categories: Business Search, People Search and Web Search.