There should be a file on the CD with "ecos" in the name, like maybe ecos.tar.gz or ecos-last-rhepl.diff. Could anyone please look for it?
That'd be part of the firmware, which (according to Doug's document) isn't included on the CD. You'd need to download a firmware image from the website (if it's still live).
If, on the other hand, you're looking for the source code release for eCos, as used on the Karma, you're out of luck. We licensed it, so were under no obligation to release the source.