With the increasingly ubiquitous nature of Socialnetworks and Cloud computing, users are starting to explore newways to interact with, and exploit these developing paradigms.Social networks are used to reflect real world relationships thatallow users to share information and form connections...

The cloud computing paradigm gives rise to Web service marketplaces where complex services areprovided by several modular vendors. Recently more and more intermediaries are pushing onto themarket, thereby driving competition. Offering innovative business models which are capable ofattracting...