I hate the calendar that comes with the iPad. It never behaves the way I expect it to. What do you use instead? I don't use google calendar, so syncing with that isn't a concern, though syncing with iCal would be nice. I've got a to do app I like right now (Manage), so don't need that functionality. If the best calendar app happens to be a to do app that's fine, but for example I'm not sure I want to spend $15 on pocket informant when I would only be using half the functionality. Ideas?