Sales promotion for third parties; procurement services for third parties (purchasing goods and services for other businesses); presentation of goods on any communication media, for retail purposes; on-line advertising on a computer network; invoicing; commercial information and advice for consumers; compilation of information into a central file; business information; business inquiries; marketing, advertising and promotional services; promoting the goods and services of third parties via computer and communication networks; facilitating the exchange and sale of services and products of third parties via computer and communication networks; on-line retail store services featuring delivery of digital media