Computerized on-line ordering services in the field of general merchandise and general consumer goods; exchange services, namely bartering general merchandise and general consumer goods of others; providing an on-line commercial information directory; 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; Promoting and marketing the goods and services of others by providing a website featuring marketplace information, namely, commercial information on merchants, consumer products, business events and services; arranging for the sale of event admission vouchers via a website; providing a web site featuring ratings, reviews and recommendations on merchants, consumer products, business events and services; Promoting the sale of goods and services of others by providing a website featuring coupons, rebates, price-comparison information, product reviews, links to the retail websites of others, and discount information; Promoting the goods and services of others