I also have made a CD with the soundtrack (although let's face it, I mostly just listen to the Squid Sister's on repeat). I've gone for walks with my fiance, and I've felt the need to ink the blank sidewalk in front of me. I've also tried hunting down the shirt from Nintendo World in New York, unfortunately to no avail.
I've thought about possibly making an inkling cosplay, but not quite sure how to go about making the pattern for the hair. I know I want to use a smooth vinyl to give it that nice shiny look, and it kind of urks me that everybody just uses wigs and fleece.