This branch leverages the Mandrill API PHP wrapper class put out by MailChimp rather than relying on our own. At the time of release, it has feature parity with 1.x but innovation and most development will happen here.
Mandrill fans, time for a long overdue release of our favorite transactional email integration module. It contains numerous enhancements, bug fixes, and adds some additional flexibility for developers. This will likely be the last release in the 1.x branch, with a new 2.x branch using Mandrill's own API wrapper coming soon. Complete change log follows.