Email is by far the primary communication channel for GeoNode users and developers. Post to the lists rather than emailing individual developers — even when you know who can help — so that answers get archived and stay searchable for everyone who comes after you.
Focused on questions about GeoNode itself, plus the topics around it — projects built on top of GeoNode and customization of Django and other GeoNode libraries.
Where all active development takes place. If you're knee-deep in the code, this is the place to email. Traffic can be high, as most conversations are kept public so everyone knows what's going on.