Dive Into HTML5
Mark Pilgrim has started writing Dive Into HTML5, and has the first chapter on Canvas online now. It addition to interesting content, its beautifully typeset, in a very “retro” style. If you aren’t seeing the fonts as in the screenshot below, get a better browser.
HTML5 is a quite a revolutionary upgrade to the browser, but the key outstanding question is tooling support/framework support. I’m sure it’ll come, but not sure when, and whether it will be too late. The Register has more thoughts on that here.