More iTunes purchase issues

You may remember the issue Apple was having a week ago with the iTunes Music Store. For some odd reason, it was telling shoppers that albums could not be purchased because they were "...being modified." I ran into this myself, and there were a number of related posts on Apple's discussion boards. Tonight (it's 8:36PM EST as I write this) I'm having another issue. I get the error message pictured above when I try to purchase just about anything:

"The iTunes Music Store is unable to process purchases at this time. Credit card processing is temporarily unavailable. You may continue to browse the store. Please try to make your purchase again later."

So far, it's shown up when I try to purchase a single, an album, a TV show and a music video. The "credit card" part is kind of odd, as I'm using Paypal. Also, I've recreated the error across two machines on two different networks with two different iTMS accounts. Am I alone in this?