Kris Wallsmith has posted an announcement to the symfony blog about an upcoming event (happening Saturday November 8th from 3pm-9pm GMT) - Plugin Developers Day.
We will cover a number of plugin-related subjects in depth, including creating and naming a plugin, adding customizable model, form and action classes, unit and functional testing a plugin, packaging and releasing, and what's new in symfony 1.2.
If you've been meaning to try your hand at writing a symfony plugin or have been writing plugins for years, please join some of your fellow developers for a day of learning, collaboration and development.
Its an online event that'll be happening in the #symfony IRC channel on the Freenode IRC network. Nothing to sign up for - just show up ready to learn.