MarthaStewart's site has lots of Haloween stuff, so go start making some decorations.
here is a JELLYFISH COSTUME that you can make
with a clear umbrella and some bubblewrap.
No, we don't really celebrate Haloween here (except in some modern schools/malls). The big day here is November 1, when everyone goes home to visit the relative's graves and clean them up, say a prayer, and have a picnic.