User blog comment:KyleH/Lucene Search launching soon/@comment-265264-20091008173908

The short answer is no, there are no technical docs on the capabilities. The long answer is that we're using a modified version of Extension:MWSearch to query a Solr back-end. (We weren't able to use MWLucene and Lucene-search out of the box because it would require having a separate instance for each of our 53,000 wikis.) The source-code for the front-end is available on our public SVN if you would like to investigate further.