This piece of information is very helpful. What would be even more helpful is if someone put this somewhere on the actual website. Especially since this is the very first time I have seen anything about emails with the tracking number. I definitely do not remember seeing this anywhere during the pre-registration process, and the only thing the 2015 badge FAQ says about tracking numbers is that I can check my Event History for my tracking number if I have not received the badge by July 10th.
I agree with bishop083. Otakon has a long track record of being silent on social media about delays or other information that congoers need. I don't care if there is a delay due to the shipment company or whatever. But maybe make a news announcement about it, post on Twitter and answer the people asking on Facebook. Some people have to plan their entire trip around getting a badge in the mail. And as this is the first time the convention is doing it I think we have the right to be a bit concerned since we've had *zero* communication on this.