Will there be a separate iPad App?
The iPhone app is limiting on an iPad. It would be great to take advantage of the iPad screen real estate. With all the iPads out there, I would think that your audience could be greatly expanded by having an iPad App. I am also a Remember the Milk user, and they have a great iPad app in addition to an Android App.
I am evaluating using this at my company with as many as 20 users and I would want complete cross-platform functionality.