In this post, Kotaku writes:
"Feel ever so slightly disconnected from Link when using a dull, stock Nintendo DS stylus? Friend, we have a deal for you. Simply buy a copy of The Legend of Zelda: Phantom Hourglass, register it at Nintendo.com, burn through a quick online survey and a mere 4 to 6 weeks later, you'll be tapping your touchscreen to your heart's content with this lovely little feather pen stylus."