In order to feed your listings to Zillow, follow the instructions below:
1. Visit http://www.zillow.com/broker/RealEstateBrokerSignup.htm to sign up for free. If you already have an account, you can log in here.
2. Fill in Company Name, Company Website, Business Type (Broker), Feed Protocol (HTTP), Feed URL (www.yourwebsite.com/trulia.xml) and your Contact information.