I found a great new site for people searching for, as well as people having, yard and estate sales.
It's called yardsaleAD.com, and it has a neat, elegant design. It lets you create a login and define your location on a map, and you can then search for yard and estate sales in your area, which show up as little flags on the map.
If you're having a sale, you can post an ad for free. Check it out! www.yardsaleAD.com