Erik is a Tapestry committer. He is the co-author of Java Development with Ant and Lucene in Action (Manning). He speaks frequently at the NoFluffJustStuffSymposiums. He will also be presenting a tutorial at this years OSCON detailing how he built http://www.lucenebook.com with open source tools including Ant, Log4j, SiteMesh, Tapestry, and of course Lucene.
Erik consults through eHatcher Solutions and maintains a blog.