Advertising and commercial information services, via the internet; Dissemination of advertising for others via the Internet; Matching consumers with real estate professionals in the field of real estate services via computer network; Operating on-line marketplaces for sellers of goods and/or services; Preparing audio-visual presentations for use in advertising; Providing a searchable online advertising guide featuring the goods and services of other online vendors on the internet; Provision of advertising space by electronic means and global information networks; Real estate marketing services, namely, on-line services featuring tours of residential and commercial real estate