Lucene's Latest (for Libraries)
Solr Powered Lucene
Solr: Search at the Speed of Light
"Solr Update" at code4lib '13 - Chicago
Solr 4
Query Parsing - Tips and Tricks
Solr Recipes
Solr-ruby: the best open source search engine + ruby
Introduction to Solr
What's New in Solr 3.x / 4.0
Solr Application Development Tutorial
Solr Recipes Workshop
code4lib 2011 preconference: What's New in Solr (since 1.4.1)
Solr Powered Libraries
Solr Query Parsing
Rapid Prototyping with Solr
Lucene for Solr Developers