The online real estate 'arms race'

How much information is too much information?

SAN DIEGO — Call it the real estate Web portal arms race.

With consumers now expecting to see a comprehensive set of for-sale listings, agents, brokerages, multiple listing services and third-party aggregators are seeking to differentiate themselves from their competitors by pulling onto their Web sites anything and everything from the growing universe of information that might conceivably be connected with a home purchase.