Tokyopop just started airing animated shorts based on its original english language manga: I LUV HALLOWEEN. The Animation isn't amazing, but it's got a cool look and interesting style. If you like the manga, or if you like Tim Burton or Johnen Vasquez stuff, you should check it out. The manga issues 1 and 2 are out, and 3 is coming soon.
There will be other episodes including Bizenghast and others.
I_LUV_HALLOWEEN
