When you are buying/trading/exchanging links it can be useful to see where the site is hosted. If you are looking for a new host or just want to see how many sites your host is actually hosting there is a neat trick using MSN. Type your domain name into this tool and click "Resolve/Reverse Lookup". Enter the IP address into MSN using a query like this. The result is all the sites hosted along side yours. You can also put the IP address into this tool or this DP tool to get its exact location. Neat huh?