Matching consumers with real estate professionals in the field of real estate services via computer network; Matching potential buyers to facilitate co-ownership of residential real property; Promoting the goods of others by means of on-line real time presentation for inspection, viewing or showing of real estate; Providing a database featuring real property tax information; Providing interactive sales assessment services via the telephone for measuring the skills and knowledge of field sales forces in real world selling situations; Providing real estate leads for prospective purchasers; Real estate advertising services; Real estate marketing services in the field of homes; Real estate marketing services, namely, on-line services featuring tours of residential and commercial real estate