Thanks for checking to make sure we are aware of these changes. We are indeed aware of the upcoming USPS changes described in the article you provided and are prepared to update our system to support them according to schedule.
We will update our lister page to reflect the new names for Priority Mail Express and Express Mail International once eBay updates their system to utilize those new names, and we will also look into updating our shipping label service to reflect the new names as soon as we are able.
As mentioned in the aforementioned article, shippers will still be able to use the Express Mail and Express Mail International names and associated packaging until January 2014, so shipping labels for these services should still be accepted after July 28, 2013.
If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the “Help” tab on our site and selecting the “File Support Case” option.