I've worked with real estate technology, and the best way to get clients is to get to know the brokers. Create a relationship with a broker, "team", group, whatever you want to call it but that's what you need to do.<p>Find local real estate agents, and see who they are working with.<p>Just be careful though, chances are whatever service the agent is using for their website already has a listings creator.<p>I know that Zillow just created a service a few months ago, and there are some others out there as well.<p>Also, as far as the backend goes, you want it to be simple. Real Estate agents are concerned about making money, and for the most part they do not believe in the internet yet and they do not believe that the internet is a viable source for lead generation.<p>You're in a good position, because their mindset is changing especially with a wave of new real estate agents coming in.<p>In marketing it, you need to explain that your product is strong in two points, the front-end and the backend. Make sure your product at the bare minimum can export to a CSV file, but try to see what software agents are using to manage their agents, and create export features for that.<p>Make sure they get leads right away, and they are legit leads. I used akismet for our lead generator, and it worked great for the most part to weed out the spam.<p>Feel free to contact me if you have any questions. I'd be more than happy to help you how I can in a general sense, I don't want to step on my previous employers toes though since they are also getting into the same market eventually (could be years though).