I am thinking about creating a sort of directory of directories, with rankings and reviews and the likes. The front page will list the top directories, judged by how many votes/bump/ratings they get (havent decided which will be the main factor), similar to a top list, but not the same bland top lists that most people see. Directory owners could, only if they desired, put a link on their site somewhere to send people to our site to receive a vote, moving them along in the rankings. Daily, weekly, and monthly rankings would be recorded. *edit* new thought, I can also have the list sortable by other factors such as alexa rank, pagerank, etc. So before I waste my time doing all this I want to know if anyone will take advantage of the free service. Check out the site in my signature for an example of what I'm planning to do. It is a list of games, but you should be able to get the jist of it.
There are plenty of this kind of sites already. You can build it for your benefit and possibly others. But just don't expect to get rich from it.