Pretty standard Halloween fare. Pick up a fog machine and add a spooky graveyard miasma to your decorations. A standard fog machine will run you about $50.
The guy next door has one. You might want to supplement your standard with a 1000-watt big fog machine. Come at it from two angles. About $100.
You're going to want some fog juice.
That's not going to be enough.
While you're at it...
But just setting a fog machine out there is lame.
Oh, hell, one foggy zombie isn't enough. This one sits up when people come by.
The Something Awful front page news tackles anything both off and on the Internet. Mostly "on" though, as we're all incredible nerds.