There's lots going on with HTML5. Get the latest from the folks at Ajaxian. First, find out What's New in HTML5 (The WHATWG Blog), then look into the new Microdata Spec. There's a Sticky Notes Tutorial, and an examination of the Canvas Tag. Getting the nitty gritty details right.
Marc Johns: Drawings on paper, drawings on sticky notes, drawings on rat traps. Twitter, Flickr. Interviews.