Okay, so it's fun, beautiful, and weird, but will it print? Given that PostScript doesn't support transparency, aren't we flirting with disaster? Not necessarily. First, bear in mind lots of things aren't supported by PostScript, including gradients, and Illustrator manages to communicate them anyway. Second, you can check out areas of concern using the Flattener Preview panel (Window>Flattener Preview). Click the Refresh button and select All Affected Objects from the Highlight pop-up menu. Everything that's red needs some kind of special attention (below). Third, if you're at all concerned that something is going to go wrong, open the AI file in Photoshop (or save it as a TIFF image from Illustrator using File>Export). Set the Resolution value to 1200 ppi if you want super-sharp results that are guaranteed to print.