Here is a Facebook application to add price change charts to your Facebook profile or Box tab. If you are a realtor with Zillow ID, you can even co-brand these charts when you showcase them in your Facebook Profile!
Please check it out and provide your feedback.
Once in a while, Zillow API (search, comparables) does not return latitude and longitude. This will cause problems if you use these values to map the properties on Google Map or to calculate the distance.
One option is to use Google Geocoding service which does a good job in getting GPS co-ordinates for an address (street and state alone also works with this) - I use this as a backup when I run into missing lat/long once in a while calling Zillow API.
Here is a demo I created you can try using any address.
Also seen on Zillow Forum
Recently I looked at the PHP code called pillow. In fact it looks cool and seems to work.
You can also get comparable sales for a property using this library as I have shown at my demo page.
There is a small bug you need to fix before this will work.
You can see the comparables as shown in the above demo.
Using the latitude and longitude, you can map them on Google Maps - if you know how to program Google Maps - Check out my full blown demo.
Published on Zillow Forum
Just added walkscore and Yelp APIs to my existing Zillow API demo.
This now shows Walkscore for the property and the Yelp reviews for the neighborhood in addition to the following.
Published on Zillow Forum