UPDATE: This appears to only be working for regular Coke products. Many people have entered Sprite and Diet codes and only got the standard number of points. There is also speculation that this only works for members who received an email about this promo. But it's worth a try.
If you are a member of My Coke Rewards, today is the day to enter those codes you've been putting off. For today only, you will receive double points for each code that you enter. Go HERE to sign up or sign in and start entering your points today.