That's what I thought too, but then they're also offering the 120GB model. Do they use 60GB platters on the 120GB drive and 66 on the 200s?
Why not? Consider the range of densities in previous offerings, e.g., 26.6 GB/platter, 33.3 GB/platter and 40 GB/platter. It would be nice if WD made a 133 GB drive as it would utilize nearly the full capacity available to legacy controllers. Of course Marketing wants even, round numbers these days.