Here's a zombie walk cycle, still needs cleanup on the animation. I have a problem though, the legs are animated in FK, which works well with different sized models, except for the toes. They tend to rotate on the Z axis randomly, depending on the model. I can convert the FK leg animation to IK legs, but when using IK, the size of the model becomes an issue (stride length), but there is no toe issue.
On another note, BVHacker is awesome. It allows you to modify the file to your needs. For example, walk BVH files are usually movement from one point to another. In BVHacker you can clamp down on the forward movement to have the motion stay in one spot. Then you can crop the cycle for the start and finish of the cycle and "knit" it together to make it loop.
For those who are interested, here's the cycle repeated 4 times in the chor.
zombie_walk.mov