When I read your post earlier, I pretty much thought the same thing as Xie, that we have so many delicious visuals already from the show, people might not feel compelled to create scads more. There's a lot of photo collages and digital manipulations in some of the banners and icons people make, so that's where a lot of the original creativity comes in. plus there's andybj's and url_girl's wonderful comics and doodles!
But one sort way that QaF fandom has inspired me is in the beautiful ways some authors go into great detail describing Justin's paintings; how he paints them, what they look like, and the emotions they evoke. Those fics have inspired me to create. While I haven't started yet, I fully intend to start painting again once I get my act in gear! But i'm having too much fun reading and writing in qaf fandom at the moment....soooo....