Let me start out by saying that I HATE violent and gory horror movies and in general, do not watch them. Because incredible cruelty and bloody violence are not my idea of Entertainment.
However, I recently rented Shaun of the Dead mostly because of what I'd heard about it here and a few other places.
I loved it. Great "spoof" (if you want to call it that). Loved the beginning bits where I'd almost go; "there's a zombie!....oh no, it's just someone zoning out." Like on the bus. Great commentary on how we spend our lives.
I work nights (midnight to 8am) at a Kmart Distribution Center. People, if the World Ending Plague (tm) or something like this happens, DO NOT go to your local mall or grocery store. Find one of these places and hole up. Miles and miles of everything you'd find at your local retail store. Pallets upon pallets of bottled water, toilet paper, soap, clothing, etc, etc.
And lots of forklifts and carts to ride around in!