It seems people keep comming up with new and exciting ways to get zombies into a story. The triggering case for this observation is that the good dudes and dudettes over at Shocktillyoudrop writing about a movie called Cockneys vs. Zombies. I'll give you a second to absorb that title. To my understanding it's kind of Snatch/Lock, Stock meets George Romero, or possibly 28 days later, you know how it goes.
That's one thing I love about zombies, they're like cheese. And by that, I do not mean that their quality increases over time, nor that they're what sweet dreams are made of (think about it.) What I mean is that you can add zombies to damn near everything. Of course, it might be silly, but in some cases, it might be good, or possibly even awesome to the point of awesomeness.
In closing: Zombies are like cheese.