It's a very basic HTML5 starter pack with a clean & ordered directory structure fit for most projects, a few of the most common files (html, css, js), as well as a basic Photoshop web design template, again with an groups structure fit for most projects.
via HTML5 Starter Pack by Radu Chelariu | Sickdesigner.com.
A jQuery plugin for mobile web development on the iPhone, iPod Touch, and other forward-thinking devices.
via jQTouch — jQuery plugin for mobile web development.
The First HTML5 Mobile App Framework
Sencha Touch allows you to develop web apps that look and feel native
on Apple iOS and Google Android touchscreen devices.
via Sencha – Sencha Touch Overview – HTML5 Mobile App Framework.
Collecting examples of creative, innovative, and unexpected use of emerging web technologies such as HTML5 and CSS3.
via HTML5 Watch.
Da kann man ja nur hoffen, dass rotierende E-Mail-Klammeraffen und zig blinkende Icons doch der Vergangenheit angehören. Ansonsten kann man bestimmt mit einigen gezielten Effekten die Usability von Webseiten erhöhen.
First things first – these demos are showing of CSS transitions, transforms (2D and 3D) and animations. Currently (May 2010), transitions and 2D transforms are available in all current browsers (at least in a dev build) apart from Internet Explorer, 3D transforms and animations are only in Safari. Most examples degrade nicely, so if you are using a legacy browser you can still use a site using these, you just won't get animation. 3D transforms generally don't degrade nicely, so be careful when using them.
via Using CSS3 Transitions, Transforms and Animation.

CSS 2.1 and CSS 3 Help Cheat Sheets (PDF) – Smashing Magazine.
One of these effects is creating caption text to appear over the top of images, creating some nice visual feedback for the user and giving them some information about the image they’ve moused over or focused on.
viaSnazzy Hover Effects Using CSS.
Kleines, feines Online-Tool, um möglichst für alle aktuellen Browser CSS3-Parameter zu editieren bzw. entsprechende Alternativen für den IE zu finden: CSS3 Please! The Cross-Browser CSS3 Rule Generator.