Don't think we can point the finger on Goggle Earth on this one.. I went to Goggle Earth and keyed in my address. The best i can get is a very fuzzy overhead view om my property. The panoramic views cant be found anywhere. Also got the same results on Microsoft's Virtual Earth, so I'm pointing all fingers at Zillow
look at the information in Zillow - it says Google Earth or Microsoft in the corner (attached)
They are not doing anything but a mashup - there are tons that use the GIS information in google earth and other services, just need to put the code in the right order.