Selected answers from the Dumb SEO Questions Facebook & G+ community.
Francois-Pierre Marcil: What are Wallpapers for? What is their utility? Inspire, support dreams etc. They are a creative output, thus can create a lot of conversations...
Glenn Cooper: Links, citations, social signals (reddit is good)
Ash Nallawalla: Get articles written about all the houses that have pasted them on their walls. - shows one of the potential challenges with this topic.