That's a bummer because I'm testing two Mailchimp integrations - one of which claims to integrate with Community Builder fields - and neither one of them are very well supported, and I can't get either of them to work.
I hope that there is some interest in the near future. The reason this has become an issue for me is because of AcyMailings new licensing pricing, which has priced me out of being able to continue to use them. They used to allow unlimited accounts for developer-level registration, but now limit it to 5 sites, so my cost would go up 6x - more than any of my clients could ever afford to pay (in addition to all the other third-party licenses I maintain for them).
If anything changes, or if someone else becomes interested in creating a nice Mailchimp integration, I'd very much appreciate it.
Thank you,
Ernie