Who is ‘sharing’ their live home data? Pieter ‘Bwired’ created a website that makes it easy to share certain data. You decide what information you want to share. Generally people share temperature/humidity information and possibly energy consumption.
Look at the Domoticaworld setup by BWired. We all run a script every hour that sends some house data through XML.
rklootwijk wrote a GUI to make it east to send this data to the Bwired server. More info is available on the domotica forum.