Maybe Flex isn´t the way to go, it all depends. Besides being a new (better) language and runtime, I can see myself using FD and MTASC for a long time until I really have the need
to go AS3, I won´t go Flex2 just becouse someone told me "it´s the way to go"
I´m quite satisfied with MTASC and FD and the Flash Player 8 features for now.
But that´s a good question. I guess Philipe said that it would be a feature for a FlashDevelop 3. I´m already playing with the AS3 compiler from adobe in FD. But as I said, the current configuration fills my production needs for now.