The word "mashup" has become one of the most repeated buzzwords in the industry over the past few years. Promising ease of data integration and rapid development, mashups have become an integral part of the Web 2.0 lexicon. Many people are now familiar with the stereotypical mashup example of some data rendered on a geographical map. This session focuses on building mashups using SharePoint. Specifically, we discuss how to connect to external REST services using SharePoint Designer to bring data into a page in the form of Web parts, and connect these Web parts to create the mashup. Finally, we discuss how to render data on a geographical map using XSLT.