According to a PowerPage reader zobkiw@triplesoft.com
Jai in Apple USB Support wrote me today (10/29/99):
USB 1.2 does not support Cardbus cards and hence will not install on yourPowerBook.
We are working on a rev of USB that will work on PowerBooks which will beshipped in a few weeks.
and another PowerPage reader dbergstr@fhcrc.org wrote us telling us that
I also received my MacAlly Cardbus-to-USB card yesterday, but I ordered mine on Wednesday afternoon 🙂
So it looks like USB drivers are on their way and MacAlly USB cards are shipping.