HTML 5 - Who, What, Where <p>I am looking at HTML5 information at W3. Some of the new functionality seems interesting.</p> <p>Which browsers support it?</p> <p>How can I ensure that I am using HTML 5?</p> <p>Is there a way to be told that "there is an HTML 5 command you should be using" if I use something in HTML 4 or what not?</p> <p>HTML 5 Canvas is supposed to allow a lot of Flash type functionality no?</p>