CMS/Business Directory

I tried asking this question in the general forums with no help. Maybe someone can help me here?

does anyone know a good solution that is already in existance (under a deadline here so I dont have time to write one.) that will allow users to search through business listings nad allow businesses to create a new listing?

If none of that made sense I am looking for something exactly like what is found at : www.citysearch.com

If anyone knows of an out of the box CMS site that will do something very similar pelase tell me!!

Thanks in advance!!

Anjari