• The admin generator will be rewritten from scratch to leverage the new form framework.
• The Propel plugin and the Doctrine plugin will be bundled with symfony 1.2. So, as of symfony 1.2, the core team will officially support Doctrine as a first class citizen.
• symfony will support RESTful routing with new sfObjectRoute and sf(Propel|Doctrine)Route
• The Swift library, one of the most feature-full and flexible solution for sending emails in PHP, will be integrated into the core.
• We don't want to force you to use a specific javascript library, we will move all the Propel and Scriptaculous JavaScript stuff into a plugin. JavascriptBaseHelper will contain common JS functionality for reuse in plugins.
• The project:deploy task will be enhanced to a proper deployment task.
• PHP 5.2 will be the minimum version of PHP required to use symfony.
• native input filtering. We will base this feature on the new filter extension bundled with PHP 5.2.

http://www.symfony-project.org/blog/2008/07/01/symfony-1-2-roadmap

[Milestone updated to reflect a likely final release. Nov 1st was the first Beta relase]