This feels like a lot of the good stuff Google Wave promised (and failed to deliver) but implemented with e-mail, in a way that will scale. Very nice, and I hop

This feels like a lot of the good stuff Google Wave promised (and failed to deliver) but implemented with e-mail, in a way that will scale. Very nice, and I hope they get good adoption, because whilst most e-mail list web interfaces are terrible, keeping e-mail for casual contributors is invaluable.