Hello Lars
I had been told that there are newer driver samples source code since "IBMDDKit-2004.zip", that were posted on the IBM DDK free registration site, but we may not have. That will be a lot useful also to document, archive and preserve.
Older DDK stuff is useful for historic research, and the OS/2 Museum does that a lot.
If anybody has something old or new missing, please let Michel or me to know.
Regards