Lately I've been developing flash games with AS3 in FlashDevelop and FlexBuilder. I've used both Flixel and FlashPunk for development and feel that both of them have their own strengths and weaknesses. Maybe in a later post I'll do a comparison between the two and explain which I prefer for most games.
Maybe in the upcoming weeks I'll post a few tutorials and share the source code to the prototypes I'm working on.