Lucene and Solr are great tools to have in a developer toolbox. Erik has built several applications using Lucene from his own personal blogging system to faceted library navigation system handling millions of records. In this talk Erik will describe these applications, what made their use of Lucene and other technologies unique and interesting, and where these applications are going. The applications discussed: blogscene, lucenebook.com, Rossetti Archive search engine, Collex, and Blacklight. These applications use a variety of other technologies, though all use Lucene, some also using Solr.