Will there be any posters added to the store at any point?
Some prints of the awesome MaSu-artwork would be really nice.
Some ideas:
A series of all the album cover arts printed (separately) in something like 4x original size on really thick, glossy and nice paper?
A big "widescreen"-print of something like the still image used on the youtube releases of force feedback and nova prospekt.
A widescreen print of the ticket from the through the looking glass video could turn out nice, maybe.