"Anthropologists visit the temple sites and read the inscriptions and make up stories about the Maya, but they do not read the signs correctly. It's just their imagination. Other people write about prophecy in the name of the Maya. They say that the world will end in December 2012. The Mayan elders are angry with this. The world will not end. It will be transformed."
Not quite sure about the more esoteric stuff though:
At sunrise on December 21, 2012 for the first time in 26,000 years the Sun rises to conjunct the intersection of the Milky Way and the plane of the ecliptic. This cosmic cross is considered to be an embodiment of the Sacred Tree, The Tree of Life, a tree remembered in all the world's spiritual traditions.
Some observers say this alignment with the heart of the galaxy in 2012 will open a channel for cosmic energy to flow through the Earth, cleansing it and all that dwells upon it, raising all to a higher level of vibration.