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3. Since there is no backend, any changes do no don't persist (i.e. changes to notes, new notes or folders are lost after navigating away from the page)
4. The search box always returns the same results regardless of search term.
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We utilize the open source jQuery RTE plugin (http://www.intrepidstudios.com/projects/jquery-rich-text-editor/documentation.aspx) to provide basic rich-test editing capability (along with significant modifications of our own to provide the video-sync highlights and better feedback).
We use Ben Alman's hashchange jQuery plugin (http://benalman.com/projects/jquery-hashchange-plugin/).
We also use jQuery (http://jquery.com/) and jQuery UI (http://jqueryui.com/).