Yes, Shawn of the Dead is on my fave list as well.
Have you seen Juan of the Dead? It's a ZomCom (a term I just created! I wonder if someone else beat me to it.) made in Spain but based in Cuba. I highly recommend it. It's obviously inspired by Shawn of the Dead, but is in no way a copy or adaptation. It's very violent, bloody, and funny. The humor is a bit more warped than in Shawn.
Warm Bodies is actually a zombie version of Romeo and Juliet. I'm glad I didn't know that going in, because it was kind of fun realizing it on my own. And I agree that some people just don't like so see their genre entertainment evolving, changing, or branching out in any way. I would love to see a female Doctor Who, but according to the BF who has seen this possibility discussed online, many of the fans simply lost their minds at the very thought. (Although there is a comedy special out there with Joanna Lumley as the Doctor for a few brief moments. But that's hardly canon. *sigh*) And I can't think about the furor that Uhura kissing Spock caused without wanting to slap some people.
I'm pleased to hear that you like Warm Bodies.