Zillow Heat Maps

I was just checking out Zillow’s new redesign and noticed something I hadn’t seen before. The Zillow Heat Map layer shows you relative price per square foot over a region. Check the box in the upper-right of the map view and zoon out to city level to see it in action.
Was that there before or is this new?
Comments
Thanks Drew. Very cool. I also see you have a page which highlights heat maps from major cities around the US that link to the city pages so you can get the latest.

Drew from Zillow here -
We added lots of cool stuff last night, but this feature was not among the new ones. We actually launched heatmaps in July
http://www.zillowblog.com/zill.....mania.html
and highlight them on our blog every now and then.
Here’s one example: http://www.zillowblog.com/zill.....lls_o.html