A very common pre-meeting task is to do X minutes of prep work — review a doc, check the agenda, finish key work you're about to present, etc.
It'd be helpful to spawn a task that isn't the meeting itself, but that prep time. Anytime I see a calendar event that's easily added, I feel a pang of frustration: I want the prep task, not the event.
Sunsama seems very designed for tracking time, hence the ability to import events into the To Do list. But I suspect the collective need for creating prep time tasks is even larger.