I've recently ordered a print of this photo for a friend, and got it enlarged and printed at Photobox. I've realised it would make a nice gift to my sister too, but I don't have time to get one delivered here before I head out to the US to see her (and I don't want to be carrying a big poster tube around with me). Has anybody got any recommendations of online printing sites in the US? I'd like to get a medium sized poster print, just on normal glossy paper. The one I got now was 20" by 16".