I've created three new variant decks for Last Night on Earth, and they're now available together in one deck via Artscow. Here's the link: http://www.artscow.com/share/wrzxudx6xcqw
Currently, the deck will run you $10.99 plus $6 shipping, so you might want to wait to order until there's a coupon code for card decks (which come up every so often). Usually those will give you a deck for $4.99 with free shipping, which would make this a lot more worthwhile, no doubt. I'll reply back to this post next time a coupon is available.
The variants include Outdoor Encounters, which give Heroes an encounter when they end their Move alone in an outdoor space and roll a 1 or 2 on an "Encounter Roll". Many of these are good things like items, but some may be bad; Zombie Hero Abilities, which give a basic ability to each character when they become a Zombie Hero, based as closely as possible on one of their Hero abilities; and the Sun Track Deck, which includes small general effects that remain in play for the current turn. These can all be used together, as the Zombie Hero Abilities and Outdoor Encounters are each worth one dot, and the Sun Track Deck is relatively balanced between cards that would help/hinder the Heroes or Zombies. Except for the Zombie Hero Abilities which include Heroes from the expansions, all effects for the Sun Track Deck and Outdoor Encounters can be used with the base game only.