Lucene: http://lucene.apache.org/core/mirrors-core-latest-redir.html
Solr: http://lucene.apache.org/solr/mirrors-solr-latest-redir.html
If you follow Lucene/Solr you have probably already heard the news.
There are nineteen (19) new features in Lucene and twenty (20) in Solr so don’t neglect the release notes.
Spend some time with both releases. I don’t think you will be disappointed.