Understand market trends across metro areas. Here the change in home values (as estimated by Zillow.com) and the trend in foreclosures for a number of metro areas are presented together. This dashboard lets you see changes in home prices in the context of foreclosures in the area, which is clearly an important influence on the price. In the Washington D.C. area, home prices dropped right along with a dramatic rise in foreclosures, but are now rebounding.
You can also filter to different metro areas and see that, for example, the Boston area did much better than the Las Vegas area.