A few weeks ago I blogged about Zillow releasing 2007 Q3 Quarterly Real Estate Market Reports. For 'spreadsheet people', you could spend a lot of time going through the excel document and drilling down into thousands of local numbers.
Luckily for us more 'visual people'. A senior developer at Zillow was able to put the Guitar Hero game down long enough to create this very cool interactive map that color codes trends across the US.
Check it out here.