The official channel is #ZeroPhone on freenode. It's mostly used for casual talk about ZeroPhone and ZPUI development, debugging and issues.
If you don't get a response in time (because of timezones and other reasons people might not be online) and have to leave - please, leave your email address (or other form of communication) before leaving IRC, so that we can get back to you (you can PM your contact details to CRImier on IRC).
We mostly us it for keeping tracks of formal development tasks and bugs
- ZPUI issues - for ZPUI tasks and bugs
- Discussion and research - for ZeroPhone tasks and bugs
If you prefer, you can email the main developer: arsenijs at zerophone dot org