This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
The Lucene documentation contains a couple of example codes (IndexFiles and SearchFiles) that show how to index and search text files, repectively. There's also an example of how to index HTML, and a web application that uses it. What are you looking for beyond that?