Registering your copy of Phantom Hourglass and answering a survey on Nintendo’s site rewarded you with a feather stylus. I just got mine in the mail yesterday.
I was impressed that the box had a fancy outer sleeve and the stylus is held in place by molded foam. The stylus itself is a very elegant clear solid plastic and feels nice. I haven’t had a chance to use it on the actual game, but I will soon. Hopefully Nintendo starts ramping up more of these bonuses for its fans here like it does in Japan.