I do a lot of work helping MLSs choose their next MLS technology vendor and I also work with brokers that use multiple real estate technology tools.  The one thing both sets of technology have in common is the fact that without good data the technology is worthless.  Numerous roadblocks exist today, however, on the data front that often derails the best software.  Some roadblocks come from within the MLS but some come from the technology vendors themselves. MLSs can serve as roadblocks to listing and sales data at the source, meaning they may put arbitrary restrictions on data use [...]