National Realtor web site realtor.com has added a new service to their offering. They have integrated with MicroSoft Virtual Earth to provide a home valuation option. A service like this is important when trying to get a ballpark on homes within a market. In Las Vegas, those interested in real estate may use the local MLS search to find properties for sale. For specific property values and comparables use a Las Vegas Realtor to accurately determine the right move.