I just created and published a new gadget on live.com called "Zillow Home Value Estimate".  Please give it a try!  The above link points to the gadget hosted on gallery.live.com.  If you are brave enough, you can also try the one I hosted on my own site by clicking the following link "Add the gadget to your live.com" or "Add the gadget to your live space".  I would normally upgrade the 2nd one quicker

Screenshot:

If you are a home owner put this gadget on your own personalized live.com homepage, so you could closely monitor the value trend of your property.  Type in the street address and city/state (or zip code) of the real estate property that you are interested in, the zillow estimate (zestimate) and the 1 year value trend chart will appear on your live.com personalized home page.  To change the address, click on the underlined address itself and the editing functionality will show up.  The gadget uses zillow web services API to query the home value estimate.

A tip for developing live.com gadgets is beside publishing your new gadgets to the live.com gallery, you could also post a quick link on your own website/blog too so that the visitors can add your gadgets to their home page by a simple click on your site.  All you need to do is put a hyper link http://www.live.com/?add=URL_TO_YOUR_GADGET_XML_FILE for adding to live.com and http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=URL_TO_YOUR_GADGET_XML_FILE for adding to live spaces. For example: <a href="http://www.live.com/?add=http://stanley.jojoyao.com/live_gadgets/Zillow/ZillowGadget.xml">Add to Live.com</a> and <a href="http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=http://stanley.jojoyao.com/live_gadgets/Zillow/gadget.xml">Add to Live Spaces</a>