Migration from a Commercial Search Platform (specifically FAST ESP) to Lucene/Solr posted by Mitchell Pronschinske.
From the post:
There are many reasons that an IT department with a large scale search installation would want to move from a proprietary platform to Lucene Solr. In the case of FAST Search, the company’s purchase by Microsoft and discontinuation of the Linux platform has created an urgency for FAST users. This presentation will compare Lucene/Solr to FAST ESP on a feature basis, and as applied to an enterprise search installation. We will further explore how various advanced features of commercial enterprise search platforms can be implemented as added functions for Lucene/Solr. Actual cases will be presented describing how to map the various functions between systems.
Excellent presentation if you need to make the case for Lucene/Solr, function by function.