Yes,

here's the mothership:

Acard

There are also SCSI > CF adaptors (great if you want to put an ultra fast, low power consumption CF card in your powerbook). I can't remember the link. I think it was in some Japanese page. CF cards are as large as 64GB, but those more than $1,000. A reasonably priced CF is from 2GB to 4GB. It's also compatible with Microdrives.