On the Refulz.com blog there's a new post looking at some of the new features in CakePHP 2.0 including its use of lazy loading, the CakeEmail library and the new class loader.
With CakePHP 2.0, they have dropped support for PHP 4 and have refactored the library code to make it strictly complaint with PHP 5.2+. Modeled on Ruby on Rails (RoR), CakePHP is a tough competition to Zend framework, Symfony and CodeIgniter.
Besides the topics mentioned above, he also goes into the details of the new CakeRequest and CakeResponse models (to access information about teh current request/response). Summaries of all of the new functionality are provided along with some sample code where needed to illustrate.