These folks are a group of New Age-y artists and performers who get together to perform four times per year, on the Solstices and the Equinoxes. They release CDs of each show, which are availble on their Web site.
The C3 state their purpose as moving humanity towards the final point of awareness, which will be reached when the Mayan calendar ends on December 21, 2012. C3 states their last performance will be on this date. The good thing about these guys is they have a healthy sense of humor about it all! As they describe it: