Is there a yahoo type directory for stores?

Is there any kind of store directory out there? A website that has a list of stores divided into categories with slurls to each?

Trying to run a search on classifieds and places is kind of hit and miss right now. I get a lot of irrelevant places and a few nice places but I know that I'm probably not seeing all the best stores. In fact, I know that I'm not seeing the best stores because I sometimes will run a search for something and will often not find what I know is a great store for a particular product.

If there's a site like this please let us know. Or maybe we need one.