Text (MR/10): Each noncreature artifact is an artifact creature with power and toughness each equal to its converted mana cost. (Equipment that's a creature can't equip a creature.)
If a noncreature artifact was also a land or enchantment, it keeps those types and gains the creature type. [Mirrodin FAQ 2003/10/01]
If an Equipment becomes a creature, it can no longer equip something and so it "falls off" and stays in play. [Mirrodin FAQ 2003/10/01]
The Artifact Land cards have a mana cost of zero, so they will become 0/0 creatures and die. [Mirrodin FAQ 2003/10/01]
