figment88 - 3:41 am on Nov 27, 2004 (gmt 0)

The main reason to have niche directories is to have specialized fields for the niche.

If you have a restaurant directory, you have fields for price, type of cuisne, parking, etc. If you have a directory of auto parts stores, you have fields for types of cars, new/used, etc. Specialized fields allow for organizational schemes and parameterized searches not offered by general directories.