Action update from the Blizzard tech support team:
After completing our full investigation, we have confirmed that there was never a problem with the real money auction house itself. Players were not charged incorrect fee amounts. Players will receive the correct amount of money when their payments clear, which in some cases should be a little more than the e-mails sent between 10/22 and 10/24 say.
Here’s where I usually insert some pithy comment, but this time… eh. I guess email notifications are useful. If you’re into that sort of Auction House stuff. Easier than checking all of your auctions every day and trying to remember which ones sold or not.