Apache Solr 1.4.1 has been released and is now available for public
download!
http://www.apache.org/dyn/closer.cgi/lucene/solr/

Solr is the popular, blazing fast open source enterprise search
platform from the Apache Lucene project. Its major features include
powerful full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, and rich document (e.g., Word, PDF)
handling. Solr is highly scalable, providing distributed search and
index replication, and it powers the search and navigation features of
many of the world’s largest internet sites.

Solr is written in Java and runs as a standalone full-text search server
within a servlet container such as Tomcat. Solr uses the Lucene Java
search library at its core for full-text indexing and search, and has
REST-like HTTP/XML and JSON APIs that make it easy to use from virtually
any programming language. Solr’s powerful external configuration allows
it to be tailored to almost any type of application without Java coding,
and it has an extensive plugin architecture when more advanced
customization is required.

Solr 1.4.1 is a bug fix release for Solr 1.4 that includes many Solr bug
fixes as well as Lucene bug fixes from Lucene 2.9.3.

See all of the CHANGES here:
http://svn.apache.org/repos/asf/lucene/solr/tags/release-1.4.1/CHANGES.txt

- – Mark Miller on behalf of the Solr team