If anybody is interested, I tried a bunch
of card readers on Morphos.
I needed a smartmedia reader for
an older digital camera.

The one that worked best was called
7in1 usb reader (CR217A)
from Ccandu.(Century
Concept Digital). It has
a little usb cable that comes out of
a side compartment.
It was sold under "LinXcel" name too.
It says mass storage compliant on the
wrapper and supports 1.1 and 2.0 usb.
The others I tested showed up in poseidon
but didn't mount.
This reader seems the most reliable
and mounts when I insert my sm card.
Sandisk Imagemate worked on and off.
I tried all kinds of poseidon configs.
Zio reader was vendor specific/didn't work.
I didn't try fuji or other higher
price models. That's it!