Well, ain't technology grand, a 3D porn film at IMAX, sort of. The film, Sex and Zen 3D: Extreme Ecstasy, has made its long awaited opening in Hong Kong. The tickets for the film are selling fast and there are plenty of theatres that have sold out all of their screen times. In all, some 70% of tickets have been pre-sold. The film is a sequel of sorts to an earlier film, Sex and Zen, which was