Pascal Rettig (@cykod (https://twitter.com/cykod)) will be giving a presentation on prototyping data-driven web applications using HTML5. He'll show you how to get a new project up and running and go over tips, tricks and tools to accelerate prototype development and get your app in a usable state and ready for feedback as quickly as possible. The presentation will end with some live coding putting these ideas into practice.
For the second talk, Chris Bowen (@ChrisBowen (https://twitter.com/ChrisBowen)), developer evangalist at Microsoft will be presenting on using HTML5/JS/CSS to Create Windows 8 Apps. More details to follow.