Adobe is running an official Game Jam in San Francisco focused on Flash technologies. You are invited to join and show your goods!
The Game Jam will be held in the Adobe Office San Francisco (Townsend 601) and will kick-off on Friday (19th October 2012) around 4 PM and end on Saturday evening (20th October 2012).
All games must be built using ActionScript 3 targeting desktop browsers or mobile devices (using AIR). You are free to choose a 2D or 3D game, but it must use Stage3D.
You will need to bring your own equipment (laptop and/or devices ). They will offer a limited set of devices on-site for testing and presenting the games. The event is free and limited to 50 participants. There will be snacks and wi-fi.
Among the developers, you will find  Tom Krcha and  Lee Brimelow. The game theme will be e-mailed some days before the event, but you can start gearing up choosing your GPU accelerated game engine.
You can find more information about the game jam here.