Operating on-line marketplaces featuring featuring a wide variety of consumer goods and downloadable and streamable pre-recorded audio, video, and audiovisual content of others; providing consumer product information via the Internet or other communications networks; computerized on-line ordering services featuring a wide variety of consumer goods; providing a searchable database in the field of business information available via a global computer network; providing a searchable on-line advertising guide featuring the goods and services of other on-line vendors; Operating on-line marketplaces for sellers and buyers of goods and/or services; Provision of an on-line marketplace for buyers and sellers of goods and services