"For now, entries are stored in a simple array, so will be lost when the service is restarted, but it wouldn’t be so hard to extend the example to provide a means of retaining the blog entries."

Oooof... that hurts. It looks like they want you to do File I/O and create your own storage layer. Opera really needs to implement client-side SQL: http://dev.w3.org/html5/webstorage/#asynchronous-database-ap...