Invites are sent by email, not the horrible mail service. Invites are received within minutes of Apple sending them, that's why blogs post the info immediately.
haha I guess that makes sense. I never really thought about that, just always assumed they were sent via postal service. I liked the image in my head of bloggers waiting for the mailman rather than spamming the refresh button on their email account. I am still anxious like a little child when I am expecting a package.
Guess we have to wait a little longer to see the next "magical" device.