On-line advertising services for others; On-line advertising and marketing services; On-line ordering services featuring books; On-line professional networking services; On-line retail store services featuring downloadable electronic books; On-line retail store services featuring downloadable books; On-line retail store services featuring books; Online advertising and marketing services in the field of self publishing; Online advertising and marketing services in the field of self publishing via wireless networks for display on mobile devices; Online advertising and promotional services; Advertising services, namely, cost-per-action on-line advertising; Operating on-line marketplaces for sellers and buyers of goods and/or services; Promoting, advertising and marketing of the brands, products, services and online websites of individuals, businesses and nonprofit organizations; Promotional services, namely, providing a website featuring the online portfolio of artists to showcase their talent; Providing a searchable on-line advertising website and guide featuring the goods and services of other vendors via the Internet; Providing a searchable online advertising guide featuring the goods and services of online vendors; Providing a searchable online advertising guide featuring the goods and services of other on-line vendors on the internet; Providing a website featuring an online marketplace for exchanging goods and services with other users; Provision of an on-line marketplace for buyers and sellers of goods and services; Retail store services featuring virtual goods, namely, books for use in online virtual worlds