Get Real! Sketch, Prototype, and Capture Great Ideas with Expression Blend and SketchFlow

Microsoft Research is working on several cool ways to make web applications faster and more robust. In this session, James Mickens will describe two projects that leverage JavaScript to improve web programs running on unmodified, commodity browsers. His talk will focus on Silo, a system that exploits DOM storage and AJAX to make web pages load more quickly. He’ll also describe Mugshot, a framework which allows developers to capture and replay JavaScript application bugs that users encounter in the wild. Neither project requires users to install a plugin or otherwise change their browser.
The idea of doing something like SILO has been rattling around in my head for a while now. I'm so happy someone else got to it first. Can't wait to see it implemented: hopefully as part of an ISAPI plugin?
I would like to see a free tool which does all this stuff for me and ensures I don't have to worry about it. On top of that, it should provide the ability to 'fall back' to verbose execution mode with a querystring or cookie or something - so that amateur developers can gaze in awe at my incredible code (i.e. I can debug mixing up '>' lt and '<' gt again).
What's wrong with the standardized HTML5 Application Cache?
amazing!