here's an interesting article that i just found....
http://today.reuters.com/news/newsarticle.aspx?type=businessNews&storyID=2006-06-05T105040Z_01_N01347201_RTRUKOC_0_US-ECONOMY-HOUSING-LUXURY.xml&pageNumber=0&imageid=&cap=&sz=13&WTModLoc=NewsArt-C1-ArticlePage2