Dave, there is a small thing you should understand -- see RSS sign close to "Subscribe" and "Share"? This is called feed. Feed is essentially an XML file and Trulia explains in details, what does it mean exactly and how does it look like. Go to the page http://www.trulia.com/brokers/
and scroll down until you'll see "3. Feed type supported by Trulia" -- click on it and that is exactly an XML file. Copy and paste it to your Notepad or Wordpad program and you could edit that file there but save it with XML extension instead of TXT.