I thought I had a pretty good grip on the way Photostream worked, but got a surprise the other day when I checked my usage and saw that both Photostream and Camera Roll were taking up mulitple GB's of space. Camera Roll at 3.6 GB and Photostream at 2.0 GB. I know that Photostream is the conduit, but I thought it used the photo that was in Camera Roll. But it seems as if there are duplicates of most of my photos on my 16 GB phone. So my questsion.. once a photo has migrated to iphoto on my iMac via Photostream, is it safe (and wise) to just remove it? I always seem to have 1000 photos in my Photostream. As space is clearly at a premium on a 16GB iphone, should I be routinely clearing out the "stream" to free up space? Was wondering if I am missing something and there is some setting that will delete the photo from Photostream once it is uploaded to my computer.