The following duplicate date picks do not count. If your name is here - please check the spreadsheet, pick a date that has not been picked and add another reply to this thread.
I'm not a betting man (usually) but if I had to bet, I'd say that I am 92.71% sure that the magic date is going to be between 1/20/09 and 4/1/09, and that the following available days (availalbe last I checked) would be good moves for anybody who hasn't guessed yet, or needs to change their guess: