Howtoforge posted a guide about installing MySQL 5.6 on Ubuntu 12.10

According to What's New in MySQL 5.6, MySQL 5.6 will bring some performance improvements over MySQL 5.5. If you want to test out MySQL 5.6, you have to install one of the development releases from the MySQL downloads page because there is no stable release yet. This tutorial explains how to install the MySQL 5.6.8rc1 (Linux Generic) development release on an Ubuntu 12.10 server.

  How To Install MySQL 5.6 On Ubuntu 12.10 (Including memcached Plugin)