Just noticed it in StorageReview forums
Model numbers are these:
WD5000AAKB = 500GB 16MB PATA
WD5000AAJB = 500GB 8MB PATA
WD4000AAKB = 400GB 16MB PATA
WD4000AAJB = 400GB 8MB PATA
WD making 167GB platter PATA drives
Moderators: NeilBlanchard, Ralf Hutter, sthayashi, Lawrence Lee
WD3200AAKB is available in the channel now (also confirmed by a WD rep).
http://www.wdc.com/en/partners/PDF/2178-001010.pdf
http://www.wdc.com/en/partners/PDF/2178-001010.pdf