Hello All,
The HTML5 Initiative roadmap has been been posted. Please take a few minutes to review it and share your thoughts in the comments (on this page):
http://drupal.org/html5#roadmap
The roadmap includes two phases. The first phase includes some of the easier aspects of the initiative that are significantly important to completing the transition to HTML5. These are sort of like the bare minimum tasks we need to accomplish to effectively switch to HTML5. Currently, help is needed for Phase 1 efforts. Converting our templates and theme functions to use the new HTML5 elements and WAI-ARIA roles, and implementing Form API support for new input types and form elements is where a lot of the work lies. There are summaries & meta issues for both of these linked from the roadmap:
Templates and theme functions
Form API
The second phase includes a combination of some of the harder aspects of switching to HTML5 could mean for Drupal, along with some feature requests that I've heard so far. There are proposals in progress and ongoing work for some of the tasks listed there, but others are missing or just ideas at this point. If there's something in there (or that's not listed) that you want to see happen, please get in touch and start working on a proposal. Also, feel free to post any discussion(s) you'd like to have in this group.
Of course, all of the issues related to the initiative can be found in the issue queue tagged html5. These issues and the posts from this group are also being posted to the @drupal8html5 twitter account. More information about contributing to this initiative can be found here.