An anonymous reader writes: Up until now facebook applications have been inaccessible to the millions of people on the Internet that haven't joined Facebook yet. This policy also prevented applications from being indexed by search engines had the potential to fuel their growth significantly.
As of now facebook has started allowing people to access application canvas pages even when not logged in to Facebook, whilst still respecting their users' privacy. This means that user-specific data available on public canvas pages will be first name and profile picture (and then only if the user's profile picture is already publicly searchable). A fantastic example of this at work is Sponsor Me (http://apps.facebook.com/sponsor-me/), a facebook application which allows users to setup and run campaigns for any purpose. As you can see due to the recent facebook changes, Sponsor Me campaigns are now available to external users, giving the ability for campaigns to be discovered by the millions of non-facebook users which otherwise wouldn't be able to help out.
This can surely only help attract more user to facebook, as application developers find all new ways to tempt users into facebook with the variety of applications.