I _think_ it was Darren Jamieson, aka the Unluckiest Man In Search, aka Mr Daz who alerted me to Real Estate Hyperlinks. I can't find his original post, though.
I think my favourite aspect of this site, a site with no authority on Technorati and only three fans is that they charge $16,000 with no refund for a link baiting campaign.
I'm sure they're very good. Really. I just wonder whether the rest of us should be increasing our prices.