Web designers, here’s some more HTML5 links that you’ve just got to see. If you’re still plugging along on an XHTML (or mercy forbid, HTML4) site, this will be your last call to leave the Stone Age.

html-five.net – The HTML5 Showcase – This is the first we’ve seen of design showcases similar to the ones that popped up after CSS3 and AJAX hit the mainstream. Only this time it isn’t just about being pretty, but having powerful functions, such as sites with drag-and-drop code builders and interactive art galleries.

html5blog.org – HTML5 blog – So far, the closest thing to a guru we have. A rich resource of book reviews, tutorials, and industry news about HTML5.

html5video.org/blog/ – HTML video blog – One of the chief capabilities of HTML5 is to easily manipulate video content without relying on painful third-party plugins. Kaltura, the world’s first open source online video platform, is leading the charge to publicize this aspect.

html5games.net/ – HTML5 Games – If all of the above doesn’t whet your appetite (or you feel a little overwhelmed), head here for a refreshing break and a demo of yet more HTML5 capability. Again, HTML5 is poised to replace Java and Flash as the web gaming platform of choice.