I have seemingly been living under a rock and never heard of this animation until this post of yours. A quick youtube search sent me to this trailer http://www.youtube.com/watch?v=tMPhHTtKZ8Q and I immediately went to Best Buy to pick it up.Amazing!
It really is a great movie! I loved it! You don't see animation so stylized anymore. At least I haven't. :P
Ever see any animations done by Madhouse? I highly recommend you watch the series "Kaiba" (you'll have to find a torrent with english subs as it has yet to be dubbed or distributed stateside). It is only 12 episodes long and thus, easily digestible. The animation style is very much vintage with a few modern bits tossed in there. Imagine Astro Boy, The Little Prince, Felix the Cat (the insanely random, bordering psychedelic, stuff), and Porky in Wackyland, all rolled into something unbelievably amazing.