The main channel on IIP to discuss about development is #iip. You will need to get IIP working to be able to join it. See the section Installation & Tutorial for more information how to connect to IIP.

Each Tuesday at 23:00 GMT we try to have an IIP meeting where the weekly happenings are discussed. These meetings take place in the channel #iip-dev. Everybody is welcome to join. Based on the volume of people attending we might decide to moderate the channel.