Maybe you should allow the user to test the product without having to go through the account creation process?
You have no idea how tedious it is for me to see yet another account create form.
Maybe you could display the data as it is loading?
So instead of making the user wait to see all the results you could show the user as the server drip feeds the results to the browser.
Just a suggestion.
You produce a lot of data but it is hard to make sense of it all, maybe some kind of comparison tool would be useful?
Also I am very curious how you managed to do the whole nearby celebrity address thing?
This actually has a lot of potential, but I am not sure if you could profit by selling this to real estate agents as something like this kind of makes their job obsolete.
Maybe you could target the renters demographic, people who rent generally switch locations more often (therefore more recurrent to your service) and are not as accommodated by real estate agents and other third parties (probably because they are not spending as much so no fat commissions).
I don't know your business model very well but another idea is maybe leaving the service free and placing advertisements. Your user demographic is looking to buy or rent a property - very valuable to advertisers.
So maybe you should cache the pages you generate and add them to an automatically generated sitemap allowing google to index those and hopefully you will start appearing on search results for people looking to buy a property.
If you want to be really aggressive you could scrape property listings off real estate websites and pre-generate those to be indexed by google with the intention of appearing on search results.