Emil Eifrem explains graph databases, what domains they fit well, and the state of Neo4j. Also: how graph databases stack up against RDBMs.
Carl Lerche talks about the changes, design and new features in Rails 3. Also: the concepts and reasons behind Arel, the Rails 3 relational algebra library.
Ilya Grigorik discusses his company's PostRank algorithm for tracking reader engagement with content. Also: his experience scaling MySQL, Tokyo Cabinet, Ruby HTTP libs, Solr, Amazon EC2 and more.
In this interview from QCon London 2008, InfoQ Chief Architect Alexandru Popescu discusses the architecture of InfoQ, integrating WebWork and DWR, Hibernate and JCR, Hibernate scalability, MySQL replication, the new InfoQ video streaming system, the video encoding process, site search, and future plans for InfoQ.