1. The Maya predicted the existence of a black hole at the center of our Galaxy, a black hole they called "HUNAB KU"; their central sun and creator of all. In recent years, Modern Science confirmed the existence of a black hole at the center of our Milky Way galaxy.
http://www.space.com/scienceastronomy/astronomy/mw_blackhole_010905.html
2. The Mayan Calendar predicted a total solar eclipse in 1999, it occurred on schedule.
http://www.thewildrose.net/total_solar_eclipse.html
3. The Mayan Calendar predicted an eruption of cosmic energy rays from the back hole would occur in 1992, twenty years prior to 2012. This energy would help create aggressive sun spots and bring increasingly hotter temperatures to Earth. We are now witnessing the affects now and our pollution is only making things worse. The cosmic energy rays were witnessed and confirmed in 2004.
4.The Mayan Calendar predicted a change of consciousness from left-brain thinking to right-brain thinking (Logical to Intuitive) in the same time period as above. Further, some deduced the melt down of the worlds paper currencies in a period between Nov. 2007 and Oct. 2008 as humanity loses confidence in the abstract (paper currency) and embraces the more concrete, such as gold and other precious metals : They are both in process.
References :
The Seven Mayan Prophecies
Message of awareness and hope
http://www.dosmundos.com/editions/Vol26Issue40-10-05-06/Community/sports-Aeng.htm