It's not just you: 20% of iTunes users currently unable to make purchases

As of 9am PDT/12pm EDT today, 20% of users are currently unable to make purchases on the iTunes Store. That's according to a bunch of you who are yelling at us, and Apple's System Status page.
iTunes Store - 20% of users are affected. Users are unable to make purchases.
All other stores are services seem to be operating normally, so if you're having trouble, hang tight. Apple should have it up and running in no time. Meanwhile, if you can't buy from iTunes, let us know where you are, how long it's been offline for you, and when it starts working again.
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Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.