It would appear that there is the assumption that the move to Zend is going to lose code that has already been developed in the head branch. This, unfortunately, is even coming from former dP developers who should know better. Let me make this absolutely clear. The Zend revamp is to use the Zend base libraries, MVC controller and other framework components to provide a solid architectural base for the code. The existing business logic will be retained. We are not throwing out the baby with the bath water. A lot of code will go, but even more will remain. To do otherwise would be suicidal.
So to all of those that developed fixes and functionality in the head branch and are wondering if their work was in vain, rest assured that unless it was crap code, it will be in the 3 release.