If you're interested to get together regularly to talk about authoring materials for HTML 5, please add yourself to this list:
The Web Developer’s Guide to HTML 5
This page is to help manage contributions to the guide and allow anyone to contribute by adding, modifying and deleting sections sections. The content of this wiki will be regularly reviewed by the editor(s) who will then incorporate the good suggestions into the document.
How to Contribute
Quick editorial comments, suggestions and general discussion should be mailed to public-html. Contributors who wish to contribute prose to the guide should publish their suggestions in this wiki, in the appropriate format (see below). Contributors are expected to take the feedback of others into consideration as they write any sections.
Contributions for each separate section should be organised into separate pages on this wiki. Pages describing elements should follow the format in this Element Template and the the URI should be /Guide/tagname (where tagname is the lowercase version of the element's tag name) e.g. See Guide/body for the body element.
Planning Documents
Contents
(To be written.) This should try to follow the organisation of the actual guide with links to a page for each section.
Why HTML 5 Is Necessary - It's going to be important to build a case for why authors should be using HTML 5 versus older methods. A lot of people won't understand the value proposition, like this guy.
- Elements