The sound is continuous and sounds sort of like a kid running by a picket fence, while holding a stick on slats so it makes a "tacka-tacka-tacka" sound. How's that for a vintage image?! It's like a scene from a "Little Rascals" episode! Now I know I'm getting old!

I can't identify the exact location of the noise using any stethescope-type tool, because it only happens when the car is in motion. I'm not a stunt man!

If the problem gets worse, affects the braking performance, or just really starts annoying me, I suppose I could replace the ABS pump, and hope that fixes it.

Thanks!