10/1/2008: You own a nontoken permanent if it started the game in your deck. If it started the game in no one's deck (for example, it was brought into the game by Living Wish), you own it if you brought it into the game.
10/1/2008: You own a token permanent if you controlled the spell or ability that put it onto the battlefield. If it wasn't put onto the battlefield by a spell or ability (for example, it was put onto the battlefield by Words of Wilding's replacement effect), you own it if you put it onto the battlefield.