I am happy keep the Hibernate Search 5 release train rolling by announcing Hibernate Search 5.0.0.Beta2. Download it from the JBoss Maven Repository using the GAV org.hibernate:hibernate-search:5.0.0.Beta2 or from SourceForge. The full change log is available via the JIRA release notes.
As Sanne mentioned on the Beta1 release blog, it is all about getting the final release of Search 5 over the finish line. The resolved issues are mostly minor and center around polishing API and documentation. In particular the geospatial support got a bit of an overhaul. One issue, however, stands out of the crowd - HSEARCH-1699. It deals with how synchronous index updates are applied. You as user are probably only interested in the indexing performance you gain (our initial tests show they are considerable and we will follow up with some numbers). Still, in case you want to know more, refer to the JIRA issue which outlines the gory details.