The Gmane server crashed. They had restored it partly, but not the netlabs tree. It's unlikely that the netlabs.org groups will ever work again. The same applies to the Gmane Web interface.
For monitoring the bug reports, Trac exists. Note that a commonly-made error is to get a netlabs.org account, but omit adding your email address to your project settings. That has to be made for each project to receive emails: Log in to a project, click on 'Preferences' on the top and on the 'General' tab enter your email address. Then you're usually notified about changes where you have posted a message to or where you have added yourself to the Cc list.
Communication between developers has to be made via PM etc. For announcements, messages have to be written to you and/or to other website maintainers.
To monitor activity, Jan does a very good job on his
netlabs.org blog page.