You can actually preview it by just going to one of the groups as it seems live now (at least for me). I am guessing several people from the gmail team worked o

You can actually preview it by just going to one of the groups as it seems live now (at least for me). I am guessing several people from the gmail team worked on this as it has that same feel and works nicely. I don't use groups very often, but seems like a big improvement.