I ran across an interesting article in the February '07 issue of Popular Science about Curriki, a new website/organization set up by Scott McNealy to promote Open Source eLearning.
The site is: http://www.curriki.org
In March 2004, McNealy helped create the Global Education & Learning Community (GELC) to leverage open source to provide learning materials for everyone, anywhere. GELC was spun off in 2006 as an independent 501(c)(3) nonprofit now known as Curriki - the Global Education & Learning Community.
The content is in a Wiki format, but interestingly enough:
it can take a Texbook Wiki document and convert it to a DocBook XML format suitable as a portable eBook, or a PDF file suitable for printing. It can also package assets into portable learning objects in the form of IMS/SCORM compliant content packages. It includes tools for configuring the transformation of assets (Form to form, like XML to PDF or ODF) and packaging of assets (For specific LMSs, or with specific metadata).
We've been working to address eLearning content structure as part of the OASIS DITA Learning Content subcommittee. We will definitely need to make sure these two efforts are compatible!