Unlike the Gap logo change, this one is actually pretty clever. But it isn't going to make MySpace relevant again.
MySpace's reputation and image is too tarnished for it to become hip again. The new logo looks like the logo of a cool new startup that would attract the hipsters looking for a space to make their own, but unfortunately MySpace isn't new, and it isn't considered cool either.
MySpace is proof that if you allow users to copy-paste in arbitrary CSS, they will use it to rebuild GeoCities.
Optimize the site for the most active users: musicians. They haven't leaved MySpace yet. Don't know exactly why, maybe it's a chicken and egg thing, since every artist is on MySpace.