The term "HTML5" covers so many different topics that developers have a hard time getting up to speed on all of them. Some APIs and features are part of accepted standards, while some are still a work in progress. Additionally, there are a number of great resources out there, but most are still very hard to find. As announced on the chromium.org blog, Google is releasing a new developer resource dedicated to all that is HTML5, HTML5Rocks.com.
As always I'll wait until I see sites ranking ahead of mine using this before I update. I'm all for innovation but I can't tell you how many times I've seen it backfire in unexpected ways until the bugs are worked out. I've done my time as being one of the first to take flack by jumping on new ideas too soon.
Still do not understand why the new document type declaration doesn't declare anything. Why would it have been so bad to include a version number in there? Just seems like something that's going to be a nuisance in future when new versions appear.