Developing in HTML5
To many developers HTML5 represents a future where cross-browser compatibility is finally possible, and a new way of presenting web content will usher in a new age of web standards. Unfortunately, it’s still a long way off from completion, many projections land its completion in the year 2022, but it’s far from unusable. Here’s a list of awesome resources that can be used for web developers right now.
http://www.html5rocks.com/ is a site developed by Google to teach new and experienced developers about the new features HTML5 boasts, along with a little bit of history. It has APIs that users can experiment with, as well as step by step tutorials.
http://html5test.com/ is a cool site which scores your browser on how compatible it is with HTML5. It will try to check if certain HTML5 features are available on your browser.
http://infoworld.com/ a great article which covers this very topic.