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
Gears has been superseded, not canceled
Google Buzz is buzzing
It’s clear that maintaining everything in perpetuity is how you become #2
Yahoo would like a word with you
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