You've built a small to medium sized Google Web Toolkit application and you would like to attach it to a database. But you don't want to be locked into a particular vendor, such as Oracle or Microsoft's SQL Server. What else is available? How about a free, open-source, lightweight, 100% pure Java database? Join Mike Simpson as he discusses the Apache Derby database, and how to configure it to connect with GWT applications, on "GWT and Derby."