I got this via SyFy's DV!CE email...

Lots of interesting ones...

DV!CE's Halloween Costume Collection

One of my favorites:
Segway Zoltar!

To hell with costumes, I want that guy's booth gig. A trap door for food, a chemical toidy as my seat; just dolly me around from town to town and I'm good. I wouldn't even need to stop by Wardrobe and Make-up. If I installed bullet-proof glass, I could give some pretty pissah fortunes.

"You're next girlfriend will leave you for your step-father. You will raise their lovechild, alone."

"But I don't have a step-father."

"DON'T question Zoltar! Your mother is lying to you. You must leave the fair immediately and confront her! I can see that she will be waiting for you with a loaded firearm. I'd suggest you do the same. Hurry!"

"Next person in line, please."

Might want it bolted down too. I could see an angry mob rolling you down the street to the harbor.

I like the Transformer costume that actually transforms: