Ok, I spoke with badflash and he says he has had up to a 65gb in these babies.
Finatronics: Your right, I had missread one of the ones that I had seen. But even still, 20gb brand new and only 9.5mm in size @ 77$ (pricewatch) is not bad, considering that the older ones are only $10-20 cheaper and half the size (and speed).
Since this question has been so easily answered, I vote we turn this thread into a posting for parts. Namely HD's