I built a real estate site that ingests data from the local MLS for the newspaper I work at. and noticed today an additional charge on the bill from the MLS.. It was labeled.. "NAR / CIVIX Settlement" after doing a bit of research it seems that CIVIX holds a patent on the ability to do searches for things like businesses around a geographical area.. Reading the actual patent makes it sound like just about any web app that we (and other web developers) can build would be infringing on the letter of their patent... Have you heard of CIVIX?..