If this was billed as "FooBar: Justin Timberlake's new music social network" I would have signed up for an invite instantly. However, "sign up for an invite to MySpace" seems uncompelling. It'll be just as hard for them turn around the name MySpace as it would be for a night club that has become passe.
(Maybe it's just me... I also signed up for an invite to WireDoo.)
I tentatively disagree. If the service isn't leaps and bounds ahead of the competition, I think this could be a huge flop. However, if they can actually deliver, I can imagine this generating a huge amount of interest. "The return of MySpace" is a fairly compelling story, after all - if they pull it off.
(Maybe it's just me... I also signed up for an invite to WireDoo.)