Grant Ingersoll – Apache Solr 1.4.0 Offically Released:
„New Solr 1.4 features include
– Major performance enhancements in indexing, searching, and faceting
– Revamped all-Java index replication that’s simple to configure and
can replicate config files
– […] Dynamic search results clustering via Carrot2
– Multi-select faceting (support for multiple items in a single
category to be selected)“