Forgot to mention: One of the greatest inspiration for double page spreads for me is
http://scrapbookgeneration.blogspot.de.
If your scroll a bit through that website you can find tons of examples of double page spreads, which have a great way to emphasize papers and photos. Their (paper) pages have inspired tons of my digital pages using SSD products, and I love going back there for more inspiration.
(I hope I can post this information here, since it's the website of a store selling scrapbook supplies for traditional scrappers, so it shouldn't interfere with SSD's business as they're serving a different group of customers than SSD, but if anyone of the staff has a problem with me sharing it here, please feel free to remove this post. I won't be upset, promise!)