I've been asked to facilitate a code sprint at Drupal Camp Delhi in a couple weeks. I've never led a code sprint before, but I have participated in several.
RESTful is the native API of web browsers. When you put some website’s address into a browser, that’s an implied REST expression called a “GET” of the resource at that address.
If you've ever built a large website that requires private files, then you've probably run into this before. In Drupal 6 the CSS optimization requires that the files be stored publicly.