initial hack, zio.tgz contains the modified shuttle_usbat.c and the things I extracted from usb port sniff.
please note that :

• this patch is a quick (and dirty) hack to the official shuttle_usbat.c (kernel 2.4.10),
• patched driver does not work with HP8200 anymore,
• writing to the CF is not yet implemented - but reading is ok (at least for me ;-)

Next steps

I'm planning to clean up code in the near future, best strategy should be to integrate the ZIO! - coding to JUMPSHOT.C (after patching shuttle_usbat.c, i noticed that most of my stuff is more like things in the jumpshot driver - so I started cut-n-paste the parts I needed from jumpshot.c - a rather ugly and "never-develop-like-this" method). (My) next approach would be to :

• insert the required init and transfer-cmds to jumpshot and try to identify the ZIO at driver init, or
• create a new zio_usbat.c copied from jumpshot (another xx% sandisk-clone driver),   _AND_
• activate write mode ;-)

new driver released (based on jumpshort.c), BETA !
Why ?   The hack (see above) is not really a thing to spread, as Linux should support as much 'standard' hardware as possible, I think we need 'clean' drivers.
As of now (I still don't have any support/docs from SCM), it seems that the jumpshot-driver is the best base to start with (and apart from that, i really like the scatter-gather ;-)
Sources can be found here:
ziocf-a*.tar.gz contains all needed source files
ziocf-s*.tar.gz contains only the changed files, rest copied from /usr/src/linux/... (use ./make-small) -- see README for more information.