So I'm thinking of getting an iPad. Is there an adapter I can buy so I can charge my iPhone from the iPad? I plan on using my iphone to tether 3g to my ipad, so I don't need to pay for 3g everywhere. But tethering drains your battery so I'm thinking it will work well if I can be charging at the same time? And to anyone who's thinking "why do you need both?" its my money, not yours, leave it be.