1. In Windows, introduce a hotkey to convert a tak to a project. There already exists one to change project status so the combination should enable very quick conversion of tasks into projects, which I often end up doing.
2. In iPhone, enable Projects to be emboldened (or otherwise specifically formatted) in the ToDo view. This would more clearly differentiate them from tasks. Basically, when a project pops up in my ToDo view, it essentially asks the question, is this project complete or do I need to add more tasks to it to complete it.
Aside from that, just to mention that I think this is an incredibly powerful product and am delighted that the developers continue to work on it so actively.