I'm working in the Hibernate and Infinispan teams at Red Hat, caring about Lucene integration in products we support, striving to make it easier to use and to integrate in well known APIs and patterns, and finally to make it scale better; I love clean and well performing code. I've been an early adopter of cloud deployments scaling Lucene to a large number of requests on Amazon EC2 using Hibernate Search, and after that I worked with JIRA to make it clusterable via Infinispan. I've lived in Holland, Italy, the Dominican Republic, Chile, Portugal and the UK; love OSS and socializing with other developers to improve all and any OSS project.
We did a big refactoring of the query engine, hence the alpha tag. If you could focus your tests in this area and see if there are any issues, we would be forever grateful.
One of the points for using Hibernate Search is that your valued business data is stored in the database: a reliable transactional and relational store. So while Hibernate Search keeps the index in sync with the database during regular use, in several occasions you'll need to be able to rebuild the indexes from scratch: