What would you like to see in a business directory?

Hello webmasters,

I am currently building a template that I am going to sell on different websites like Codester and CodeGrape.
I want to build a business directory.

Here is what I have come up with ...

1. users can register and add listings.
2. admin can create categories for users to select from.
3. admin can create sub categories if necessary.
4. users can submit a review for listings ranging from 1 to 5 stars with comments.
5. users can buy a featured listings for more traffic.
6. admin can set listings parameters like website url and email address or phone number.

What else should I include?
I am not sure if I am missing something important.
Any suggestions?