If you've got unregistered games or incomplete quizzes, tomorrow is the last day to earn some Club Nintendo coins for them. It will not, however, be the last day to redeem the coins for Nintendo goodies.
Other upcoming Club Nintendo closure milestones include May 1 being the last members can earn Elite status, which entitles them to special exclusive gifts. Finally, the last day to redeem your coins is June 30. After than day, your bank of coins will be deleted and Club Nintendo will be bulldozed to begin construction on whatever Nintendo has planned next.
You can head here to take your final quizzes and redeem your final codes.
Club Nintendo was great while it lasted. I got Virtual Console games like Super Mario RPG, Super Metroid, and The Legend of Zelda: Majora's Mask for free all because I had bought other Nintendo games. I am disappointed to see it go, but Nintendo has done a good job of offering some worthwhile titles right at the end. I'm curious to see what Nintendo has planned for the Club's follow-up.