Exploiting and contextualizing free information is a natural part of library culture. In this column, Gary Roberts, the information systems and reference librarian at Herrick Library, Alfred University in Alfred, NY, describes how to use XML content on a Web site to link to hundreds of free and useful resources. He gives a general overview of the XML harvesting process and architecture, and explains in detail what is involved in server-to-server communication. The author also reminds readers of some of the potential limitations of this technology. For example, if the remote repository goes down for a while it would be enough to make the library's XML application go down, resulting in a broken-page error to the patrons. In addition, many XML content providers have limitations on the number of times you can access their repositories. For example, The New York Times specifies that you may use its feed no more than once every hour. Potential solutions to these limitations are suggested.