Sizing up the homes of Bill Gates and other top members of the new Forbes 400 list. Have you checked the newest "Forbes 400: The Full List of The Richest People in America" yet? Surprise, Bill Gates, with a net worth of $81 billion, is ranked No. 1 for the 23rd year running. Meanwhile, his friend Warren Buffett fell to third place for the first time in 15 years with a net worth of $65.5 billion. Thanks...