The new Memcache API support in MySQL 5.6 is interesting. It enables developers to use existing Memcache clients to talk to a persistent InnoDB back-end using the Memcache protocol. Dr Dobb's have a great write-up on the topic here:
I have been writing about web technology and software development since 2001. I am the developer of the Alpha Framework for PHP, and the Five.Today personal productivity app. I love open source, technology, and economics.