http://www.google.com/search?q=16GB+SD+card&tbm=shop&hl=en&oq=16GB+SD+card&aq=f&aqi=g7g-m3&aql=&gs_sm=e&gs_upl=4022l8482l0l8745l12l12l0l2l2l0l228l1522l1.3.5l9l0#sclient=psy-ab&hl=en&tbm=shop&source=hp&q=8GB+SD+card&pbx=1&oq=8GB+SD+card&aq=f&aqi=g4&aql=&gs_sm=e&gs_upl=6926l6926l0l7259l1l1l0l0l0l0l69l69l1l1l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=aa93f816c72c34c5&biw=1440&bih=775What I got from took from reading most of it:
Nintendo is greedy and doesn't want to offer downloadable full 3ds games at a discount
Nintendo is still living in hello kitty would.
Fixed!
and with Download 3ds (if they ever do that) would take up a lot for memroy on the sd card.