Never mind as you posted while I was writing. ;-)
Also, FYI for everyone, if you have any international packages you want to send via FREPadded, as long as it's under the 4 lb limit, you can use the little green customs form and don't need to fill out the larger white carbon copy form.
Those regional boxes are a very interesting concept, but I think a bit involved for the hobby ebay-er. I have some here, we'll see if I use them.
iow, and this is just me, unless eBay and/or PayPal figure out for me that it's the best option, I don't know if I'd bother figuring it out. I certainly doubt that the buyers would have a clue.
However, if you've got the volume and a real shipping department/software (not run out of a box), I can certainly see the advantages.