Let's share some case studies! Please add any site's you've built with Backbone and Drupal (with or without the Backbone module), along with a brief summary of the Backbone archtecture and any other pertinent bits.
(Please use Markdown for theming, to keep the page easily editable).
National Yiddish Book Center's Archive.org integration
Currently in theming, the upcoming Archive.org search page uses Backbone to search the center's collection of thousands of scanned Yiddish texts in either romanized or yiddish/hebrew characters. We adapted the sync method to use JSONp, for cross-site access to archive.org, and are using a two-phase progressive loading scheme. There is no Drupal-specific integration at this point.