If you already have an XML feed prepared, you can submit it to us via the link below. Just select the second option to "Submit XML Feed". You may want to review our feed guidelines first to make sure it is properly formatted. Those are located at http://static.trulia-cdn.com/resources/TruliaDevGuide.pdf.
Please be sure to let us know if you experience any difficulties with your submission or if you have any other questions.