My personal killer e-mail volume come from the ASF. It's so large that I have a separate e-mail address that I use for dealing with ASF stuff (and other large mailing lists). Some of this e-mail is informational, and now that the ASF has a semi-reliable mail archive, I can probably unsubscribe from some. But there's a lot that I can't unsubscribe from. I'm not sure that Ozzie's notion of workspaces would really solve some of the issue that I face when trying to participate in multiple projects and conversations. I'm not saying that e-mail is great, but it's hard for me to imagine using Groove to do what we do with e-mail. Even if Groove gives me a workspace where I don't get spam and where everything is "on topic", I don't see how it solves the problem of too much legitimate input. Not that e-mail is solving that problem either.