The Adobe Ideas website is dead, the URL redirects to the forums.
If I go to the feature request form, it redirects to the forums too.
In the forums if I create a new Idea and then browse locations, all Adobe Air forums are greyed out...
And there's not a feature request sub forum either, as Illustrator has.
So where can I ask for a new feature?
The main url is the best place to go to find out where to report bugs and feature requests: http://bugs.adobe.com
The link for Flash Player:
has buttons for Bug and Feature.
The link for Flex:
does say it will be retired in Jan 2013, and includes a link to the new location for Flex:
Hope that helps.