We are using lucene at http://www.todotoh.com http://www.todotoh.com We're using it to index questions and answers and have plans to extend it to recommend que

We are using lucene at http://www.todotoh.com http://www.todotoh.com We're using it to index questions and answers and have plans to extend it to recommend questions and answers to a user based on their interaction with other q's and a's. What are you using it for?