It wanders around a bit, but this extensive article by Pascal Rettig covers a lot of interesting points relating to HTML5 game development for mobile devices (with a focus on iOS devices) including sound, performance, and viewport considerations.
HTML5 localStorage provides us with the ability to store named key/value pairs locally within a users browser, this means that the data stored in localStorage is still there even after a user has closed the browser, deleted their cookies or turned off their machine/device.The HTML5 localStorage attribute is supported by most modern browsers including Firefox 3.5+, Chrome 4+, Safari 4+, Mobile Safari, Android 2+ and Internet Explorer 8+.
HTML5 evangelist Chris Heilmann uses a simple demo to pick at a sore point of HTML5: its cross-browser audio support. He wants to reignite the discussion over HTML5 audio.
Appliness
Appliness is a new ‘digital magazine’ for web app developers and aimed at readers using tablets (although a PDF preview is available). Issue 1 features an interview with Maximiliano Firtman, coverage of HTML5 canvas quirks, a jQuery Mobile tutorial and more.
Over at MSDN, David Rousset kicks off a series on turbocharging your HTML5 Canvas-based games. In this case, he picks on Canvas scaling and using CSS3 transforms to improve transitions between scenes.