Code sprint is always fun. It's gives you great opportunity to meet fellow civi folks, collaborate and implement kool stuff :). Last few days has been very interesting. Besides some great meals we also managed to get some work done. ( If you still don't know, food is the most important part of CiviCRM Sprints )
All usability work is done and committed in trunk and will be part of CiviCRM v4.1 release.