It is not uncommon to view Web2.0 and the Semantic Web as mutually exclusive, competing paths to the Web of the future, each advocated by a distinct community. We argue that the two approaches are in fact complementary, and that both face challenges the other can solve, such as how to integrate Web2.0 data on a Web scale, and how to enable users to create semantically rich annotations. Here we will use examples from Revyu.com to demonstrate how features of Web2.0 and the Semantic Web can be combined in a single service that overcomes these challenges. Revyu is a Web site where people can review and rate anything they choose. The site is built on Semantic Web technologies, but also uses common features of Web2.0, such as keyword tagging.

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