Quick post to mention something I also posted in Moodle developer forums. I've been helping to investigate how much work it will be to move the OU from our current Moodle 1.9-based system to Moodle 2.
As part of that I converted the Structured Content module (oucontent), which is what displays textbook-like content within the OU VLE.
The non-techie version of this is 'it took about four or five days to convert this module'. If anyone's interested in the techie version, however, you can find it in this Word document which is my notes of the process.