Homestore Inc. announced yesterday that Realtor.comŪ, the official Web site of NAR, will be the exclusive provider of integrated home listings and REALTORŪ directory content to the House & Home channel on the MSN network. The new multi-year agreement is expected to go live before the end of the first quarter. Home listings appearing on Realtor.com will be available to MSN customers. Homestore will share revenue from these newly available advertising positions with MSN.