Tiffany at the USPCC has been the harbinger of good news lately. The 500 Ex. decks will be differentiated via a custom seal. I'm also throwing on a gold tear-band for all the decks.
Oh, and I get to name the Experimental finish! I'm thinking... Experimental finish?
Unfortunately this release won't be labeled with that, but future releases will be. I'm getting samples in this week, I can't wait to test it out.