Hi all, I'm going to be traveling in about a week and was wondering if it was safe to use the iPad2 power adapter with an iPhone 3GS. I don't have a laptop anymore and was just going to be taking the phone and iPad on the trip, and was hoping to just stick one adapter into my iPad sleeve. Thanks! PS - If anyone would know the previous question, would it be safe to use that adapter with a friend's Nook, as well? Thanks!