1.66 is now on the live servers and the patch notes are up on the Herald, below is a snippet click here to read more:

Welcome to Dark Age of Camelot version 1.66. With this live version, we are happy to introduce Camelot's second retail expansion, Trials of Atlantis. As of this morning, Trials of Atlantis has shipped, and will be available in stores as soon as retailers receive their shipment. Trials of Atlantis is about exploration and discovery, and as such, we have intentionally left some parts of the expansion undocumented. It is up to you, the players of the game to discover the secrets of this long-lost civilization for yourselves. However, you will find documentation on some of the expansion's features such as a Master Ability overview, basic mapping information, etc. on the Camelot Herald at www.camelotherald.com.