While I'm sure many people have been waiting for this for close to 3-4 years it's finally been announced for public! The official public beta starts in February next year!
- Create Flash Games
- Currently supports ActionScript
- Intuitive Editor
- Slickset(programming editor)
- StencylWorks(Basically ask for help sort of thing)
- Built in actor functions via programming
- Easy to use and very fluid mapping editor
The editor is pretty awesome to, check it out!
Btw, I'm in the beta that's where the public release was announced, not the actual(non beta website) site.
Edit: Here's the welcome page.