Since a bunch of people are finding this group, I just want to make sure everyone knows it was created mainly so we could try to use a hangout for the developers call.
Be prepared to see invites to hangouts. Also, if you attend a hangout leave your video off. There is a limit on the number of video connections. Hopefully there is no limit on audio.
That said, if you want to post GNU Radio stuff here, go ahead. Just be warned that no one is committed to monitoring the group. Use the list for real technical discussion.