Lucene 2.9 was just released, and includes a whole host of new features. Lucene 3.0 should be released soon as basically a 2.9 minus deprecations, so if that comes out soon we should probably just jump to that.

Lucene 2.9 is not yet in the JBoss Maven repository, so that needs to be done and will be a fair amount of work (considering all the many different modules that make up Lucene).