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Hmm...haven't heard of any way to sync two seperate device's (users) to one user account. What a great idea though! The only other option I can think of would be to try a shared internet calendar. You can sync to Google Calendar over the air, but I belive the product is still in beta (I might be wrong!). This would allow you to create one user account for your family, and then have access to it from any internet capable computer. You could then sync your calendar to the Google calendar wirelessly. Let us know what ya think!