I'm aware that some might try to gain advantage by entering at the last possible moment (you know who you are :) ), which is unfair to those who boldly entered when I announced the contest. To be more fair to the prompt entries, I'm adding this addendum: starting tomorrow, all new entries will be assessed a 24-hour penalty per day, i.e. if you enter a guess tomorrow then it will be penalized 24 hours, if you enter on Thursday your guess will be penalized 48 hours, and so forth, up until the time I close entries. Today is the last day you can enter with no penalty.