Yesterday the Google Wave team confirmed Wave’s unfinished but working Google Groups integration, which lets you send waves to groups of participants in one shot. To try it out, I created The Complete Guide to Google Wave Wavers group. Join that Google Group with your Google account email (not your Wave ID), then search for
group:email@example.com in Wave to see and update group waves. Sound confusing? It is.
While I’d seen this rudimentary support for groups mentioned in various public waves, we didn’t include it in the Preview edition of The Complete Guide to Google Wave because it seemed so utterly unfinished (and it wasn’t officially documented). Right now, there’s no way to add users to Wave groups in-Wave, and messages to the group in Wave don’t show up on the list and vice versa. There’s obviously a whole lot of work to be done in the Groups arena as it relates to Wave, but for now, this is what we’ve got. Give it a try and let me know what you think in Wave.
Waving with Groups [The Google Wave Blog]
How do Google Groups access settings interact with waves? [Google Wave Help]