The changes in technology and the advancements of the World Wide Web have resulted in a different way in which people interact, and locate, and share information. Virtual communities connect people from different geographic regions and allow for the exchange of ideas among a broader range of professional. Communities of Practice, despite their recent conception, have gained tremendous importance in educational settings. This paper will present the types of COPs (virtual and face-to-face), pointing out the characteristics of both. It will discuss the advantages and disadvantages and propose a merged model drawing on the advantages of both. Special attention will be laid on the issue of ‘trust’, as a building block of the successful cooperation between the members of the COPs.