Howard Lewis Ship introduces and demoes some of the most interesting features of Twitter Bootstrap.
John Bender presents the good, the bad, and the ridiculous aspects of doing cross-platform mobile web development, suggesting progressive enhancement as a way to address the existing issues.
Bruce Eckel emphasizes using different languages within a project, each one for the task it is better fitted for, and giving several such examples: Python+Scala, Go+Python, Python+CoffeeScript.
Scott González demoes creating web applications with jQuery UI, showing the widget factory, the unified API, how to create new widgets, the CSS framework, and themes.
Yehuda Katz discusses techniques for keeping data out of the DOM based on the idea that retrieving such data from the DOM involves a performance penalty and may affect data integrity.
James Pearce introduces cross-platform web apps development using HTML5 and web frameworks, such as jQTouch, jQuery Mobile, Sencha Touch, PhoneGap, outlining what makes a good framework.