For Battlestar Galactica geeks (redundant?), I did a little googling of the significance of the number seven, which is the number of the last unknown Cylon model. From Religious Tolerance:
The Greek Phythagoreans believed that the number seven pointed symbolically to the union of the Deity with the universe. This association was picked up by the Christian church, especially during the Middle Ages. Seven was regarded as having sacred power, as in the seven cardinal virtues, seven deadly sins, seven sacraments, seven churches mentioned in the last book in the Bible, Revelation, etc.
My guess is Baltar, not Starbuck or Adama.