I was @ Google I/O at live keynote when they announced/demoed it. Ironically, at the exact same time, me and the guy next to me said (in different words), "Why do we need this?" That was a collaborative Google Wave moment IRL.

Google gears is grinding

Google Buzz is buzzing

Actually, I think it's drowning.

What about:

Gmail for Your Domain/Google Apps for Your Domain/Google Apps/Google Apps Premier Edition/Google Apps for Business/Google Apps for Work/G Suite/Google Workspace