I almost have this iCloud thing figured out (I think) but PhotoStream is elusive. My family has a long-standing iTunes Store account that we've used for all of our purchases and our home-sharing. We enter that in Settings>Store on both of our iPhones. We each have our own iCloud accounts. What I'd like to do is to be able to funnel Photostream photos from both of our phones to the iPad that we share. Is there a way to do that?