Hi this is my Game Jam base for FlashDevelop + Adobe Flash CS5.
It may not be suitable for your programming style, but it works for me. Use are your own discretion!

You can import audio into the Flash library and add it accordingly in AA.as. 
Audio files in the Flash library must be in the respective directory on the hard drive.
See chime.mp3 as an example.

You can use custom GEvent and event listeners that are automatically cleaned up.

Most MovieClips should inherit from Actor, which cleans things up on Kill().

Box2D has been updated based on changes found on the net that reduce memory leaks, particularly with bodies that use circle shapes.

You can use AddToContainer(g.sorted) and AddToLayer(g.layerSorted) and use depthValue (generally the 'y' component) on a class
inherited from Actor to automatically sort many objects each frame.

Elliot Pace (@EpaceGames)
EpaceGames.com