Jake, do you see two-way syncing with google calendar ever happening? The ability to move tasks around on the calendar would be huge. As a point of reference, the only app—that I have seen—that does this is gqueues. Their tasks sync as calendar items, which works pretty good.
Ill be honest, its unlikely to happen. A to-do list and a calendar are somewhat at odds with each other for a variety of technical reasons. Our one-way sync already has to make many compromises, especially with regard to how repeating tasks are handled.