Well, good news! The Flixel game engine is released! What does this mean? This could be groundbreaking news for Flash / Actionscript3-based game developers.
flixel is a completely free collection of Actionscript 3 files that helps organize, automate, and optimize Flash games; an object-oriented framework that lets anyone create original and complex games with thousands of objects on screen in just a few hours, without using any of the Flash libraries.
Open, attached to a community, with a forum and a decent style. Any more questions to ask? Nooo. Some days ago the developers released a little “Hello World” game, called Fathom.
Update: I made an Interview with Adam Atomic about Flixel.