10/4/2004: The lands are both lands and creatures at the same time. They are affected by anything that affects either permanent type.
10/4/2004: It affects Swamps controlled by any and all players.
10/4/2004: The creatures are not black.
8/1/2008: A noncreature permanent that turns into a creature is subject to the "summoning sickness" rule: It can only attack, and its {T} abilities can only be activated, if its controller has continuously controlled that permanent since the beginning of his or her most recent turn.