[Mashable.Com] The launch of the new MySpace begins today; it marks not only the release of a completely overhauled design, but the start of a fundamental shift in focus for what was once the world’s preeminent social network.

MySpace will roll out a completely revamped interface to its users starting today, but the rollout won’t be complete until the end of November. And because so much has changed, we can’t possibly cover every aspect of the new website and mobile experience in a single article. Everything from the homepage to profiles to the new Topic Pages focus on transforming MySpace from a social network into a “social entertainment destination.”

The MySpace site is now focused exclusively on the 13 to 35-year-old demographic — Generation Y, in other words. Its new goal is to become “the leading entertainment destination that is socially powered by the passions of fans and curators.” This is in contrast to its old goal of being “a place for friends.” It reduces the amount of design bloat from 152 templates and 81 button styles to just seven templates and two buttons. And that’s only scratching the surface of the changes to the MySpace website, not to mention the new mobile experience that will launch next month.