If you are in the real estate business and generate leads through the Internet then you should be reading News For Realtors.
The blog deals with Internet Marketing from the perspective of a realtor or real estate agent, and discusses issues that might affect you, including lead generation companies and real estate directories.
Ken Smith (the author of News For Realtors) has written an excellent summary of the PubCon site reviews that have been in the news recently, again Matt Cutts talking of how many sites you own affecting your ranking has been highlighted. Also of note is the way that Greg Boser describes the online real estate business 
