Nowadays the Web is omnipresent, reaching into almost everyone’s life. More and more Web users do not switch off their devices all the time, continuously receiving and sending messages, frequently looking for information, now and then evaluating this information, and so on. The means to reach the Web do thereby not stop at personal computers, but increasingly also include mobile devices. More and more users are sharing information online, are working collaboratively on a topic, as well as maintaining their relationship in the Web (Alby, 2008). All of this is so pervasive that it feels absolutely natural. Consequently it is not surprising that topics related to the Social Web are experiencing a surge of interest, both from the scientific community as well as the industry. However, apart from this and maybe also apart from the public perception, a complementary technological revolution takes place—the rising adaption of Semantic Web technologies. The Semantic Web is a vision that the present Web will eventually include the notion of meaning and become a metadata-rich Web where presently human-readable content will contain computer-understandable semantics (Berners-Lee, Hendler, & Lassila, 2001).