Every homeowner is curious about the value of his or her most prized investment. It often pops up in conversation at dinner parties and, as personal finance experts will advise, it will play a big part in giving people options in life.Recognizing this, Berkshire Hathaway HomeServices Fox & Roach, which sells homes in New Jersey, Pennsylvania, Delaware and Maryland, has added a new "What's Your Home Worth" tool to the home page of its website, www.foxroach.com. It is hoping the tool will generate a flow of new listing leads in a low-inventory market.Fox & Roach has made sure it is more valuable than other free services out there by offering three property appraisals -- from RPR (Realtors Property Resource), Zillow and Collateral Analytics.As a next step, homeowne...