It's been almost four years since we've seen something new from Hong Kong-based Shinnorie, but what arrived today was interesting enough for us to take notice: the Ringo Leather Pouch for iPod nano ($TBD). We're not fans of sleeve- and flip-styled designs for touchscreen iPods and iPhones, and think they're ill-suited to heavy video users, but the cuteness of this particular case -- headphone pouch on front, iPod pouch on back -- is undeniable, and…