Well, well...
I was skating around the 'net and came across a forum of Native Americans who investigate fake Indians (those selling fake Indian arts, crafts, and ceremonies) and they seem pretty dedicated. It seems that the Myans themselves have debunked the 2012 hoax. There are two thread there that discuss the topic, it looks like spanning back to at least 2009 or earlier and is ongoing.
Psssst.... get the word out. The world will survive our craziness. I thought so. Take it from the Mayans (yes, they still exist). Direct from the source. Take a view through the Native American perspective, for a change.
Please note: Unless you are familiar with Native American world and events, it would be better to read, but not participate, in those threads, unless you are very hard core and real, and have something of substance to contribute. Just sayin'.