As we all Flash Developers keep hearing about different frameworks every now and again where those frameworks claim how they are the most flexible, scalable, easily mantainable (blah blah) but if any framework which has got more attention and has been publicly accepted is no doubt PureMVC.
This link below talks about PureMVC, Whos and Whys and Hows about it, the pros and cons of it. Must read for Flash Devs.
http://blog.guya.net/2009/09/29/my-puremvc-presentation/
Cheers.
Moving Pixels 