Keith Peters nails it in his interview with ActionScriptHero.org:
The Flash community is seriously one of the best parts of being into Flash. I mean, the tools are cool, and what you can do with them is cool, but the openness and willing to help and share and teach each other is really incredible. I’ve dabbled in some other technology groups and have seen people appalled when I dared ask them how they did something, like I was trying to steal their precious secrets. But in the Flash community, you ask someone how they did something, they’ll sit you down, buy you a beer, explain it in detail and email you the source code the next day.
Couldn’t have said it better myself.