Providing a web site featuring technology that enables internet users to book travel; Providing a web site featuring technology that enables users to send and receive messages among guests of lodging accommodations owned and hosted by others and among the hosts who list lodging accommodations for rent and sale; Providing a website featuring non-downloadable software for providing an online marketplace for buyers and sellers of goods and/or services on a global computer network; Providing a website featuring on-line non-downloadable software that enables users to announce, invite others to attend and evaluate real world meetings and events; Providing an on-line network environment that features technology that enables users to share data; Providing temporary use of a non-downloadable web application for providing an online marketplace for buyers and sellers of goods and/or services on a global computer network; Software as a service (SAAS) services featuring software for users of mobile phones, portable media players, handheld computers and related mobile devices to plan, announce, invite others to attend and evaluate real world meetings and events