Kris Wallsmith just released a new plugin that should aid the task of creating and bundling Symfony plugins:
The sfTaskExtraPlugin is a plugin maintained by the symfony core team. It adds a number of useful tasks to your symfony command line to help streamline your workflow. This plugin is relatively young, so I will just be discussing those tasks that we’ll be using for today’s Plugin Developers Day. I should also note this plugin requires symfony 1.2.