According to our tipster, who works for one of Sony's Internet service providers, MySpace's security team inadvertently banned Sony employees from accessing its site in the course of going after a spammer:
I just talked to MySpace's head of security and they are lifting the block.
Here's why Sony was blocked. They get their Internet through us. MySpace went after one of our customers for MySpace spamming. We terminated that customer because I hate spammers with a vengence, but then MySpace banned our whole [system]. In essence, MySpace believed we were just a hosting provider and not the actual Internet — i.e. providing transit connectivity where companies go through us to reach other companies.
Oh and it wasn't just Sony... Los Angeles County government along with Orange County government offices use us for transit. So they were also blocked.
We were emailing MySpace for a few days, but they didn't believe we provided anything more than dedicated servers. We believe the only reason MySpace finally unblocked our network was because we sent them a link to your story.
We were scratching our heads as to why MySpace blocked Sony when Sony spends so much money advertising movies and music.