wd-mailchimp

I agree with everyone else, it has a nice interface and is easy to style. So, I plunked down $30 for the pro version and found there was no Ajax integration. As a result, there is some type of reload event for every submission. Unfortunately, WD has a "no refund" policy (unlike many of its competitors), so I'm stuck with a plug in that I won't use. That's on me for not reading the fine print. So buyer beware with this product.

This is an almost perfect solution for WP and MailChimp integration if you are ready to pay $45/y per site. AJAX confirmation is missing for 5 stars. I've stopped using it because of this.

Works well but missing Dashboard to keep an eye on your mailchimp lists while in Wordpress. Adding that gets 5 star

Periodically you need to press "Renew MailChimp lists". It could help, sometimes.

MailChimp has been a great service!

I've spent a lot of time looking for Plugins that allow you to easily format Mailchimp for free. This one does the trick!