Thanks! Not getting too far with this though.
Just for importing org.openscales.core.Map I get a problem no matter what:
Flash Builder 4.7, actionscript project:
Class mx.core::ByteArrayAsset could not be found.
Flash Builder 4.7, flex project:
Class mx.core::UIComponent could not be found (even if I import mx.core.UIComponent)
Flash CS6
Class mx.core::BitmapAsset could not be found.
So it seems that I'm always missing a piece of mx.core. Google's not helping much with this, so it seems there's something I'm assumed to know about but don't?