I'm going as the same thing I did last year. I have this really cool white ghost costume with long feathery arms and a white hood that maskes out my face. It looks awesome when the breeze blows and I totally freaked out most of the little kids last year.
Yesterday we found a very similar costume for my son, only it's all black. We also found a really cool plastic butcher knife that plays "slasher" music when you press a button.
My hubby is having is gall bladder removed on Halloween day, so he'll be at home with all the lights out.
I'm looking forward to the day when my son doesn't want me with him trick or treating. I miss seeing all the kids coming to the door, especially the little ones. They are always sooooo cute!