Hi, Gage -
Our MailChimp2 Module does work with the latest MailChimp API. Perhaps you need some assistance with the module configuration. We do actively support the extension via our Support ticket system found here - http://3by400.com/index.php/get-support/support-tickets
You may also find the following page of our website helpful as it contains FAQs and a video demonstrating the module configuration process - http://3by400.com/index.php/mailchimp-faqs
Please consider changing your review if you find this information helpful.