Search Google for real estate. As of a recent Google update, you should see Google’s newest search integration feature. (If not, try refreshing. This appears to be in a testing phase right now.)
This new feature seems to go head-to-head with the most basic of features (mapping properties for sale) offered by real estate mapping guru site zillow.com and to a lesser degree redfin.com.
Update: Breathe easy, Zillow. It would appear the giant lost interest in this toy. For now.