Mere weeks after the Realtor.com and Homes.com CEOs hurled hurled insults and accusations at each other as the residential real estate portal giants fight for second place behind Zillow, the battle was ratcheted up further on July 2 when Realtor.com parent Move, Inc. filed a lawsuit in the U.S. District Court in California, claiming that a former Move employee now working for Homes.com parent CoStar Group stole proprietary information helping Homes.com expand its burgeoning business.