Ok, rules are simple. 
-No actual exchange of money or materials will occur. 
-This will assume everyone places $5 on their bet.
-One bet per person
-Whoever is closest to the time the game is released will win the pot. 
-Times are to be listed GMT, or you will be disqualified (i'm not converting times from a dozen or more time zones)
-If 2 or more people pick the same winning time, they will have to duke it out online in Sins to determine a winner. 
Also some useful notes. 
SD opens at 3:00pm GMT  (10:00am their time)
SD timezone is -5:00 GMT
They will release the digital download sometime late afternoon their time. 
My bet is 9:03pm 27sec's GMT.