Alex Miller is a Senior Engineer with Revelytix, building federated semantic web query technology. Prior to Revelytix, Alex was technical lead at Terracotta, an engineer at BEA Systems, and Chief Architect at MetaMatrix. His interests include Java, concurrency, distributed systems, languages, and software design. Alex enjoys tweeting as @puredanger and blogging at http://tech.puredanger.com. In St. Louis, Alex is the founder of the Strange Loop developer conference and the Lambda Lounge group for the study of functional and dynamic languages. He likes nachos.