There definitely is a Mega Disko ride in Coney Island, new in May 2010 according to the New York Times:
Coney Island in Brooklyn, where in just a few weeks he will present a new amusement park featuring 22 rides, including the Tickler, a family-oriented roller coaster; the whirly Mega Disk'o; and Air Race, a heart-gulping aerobatic experience.
However, I too can find no pictures of it but I have found this video of a Zamparelli designed Mega Disk'o
http://www.youtube.com/watch?v=MAtjsTovBS8Standing restrained riders undergo a rocking motion continuously and then the entire platform they are on twirls with circular motion.