As mentioned by Steve Bedo and substantiated by Steve Passalacqua, there was an Encore GO card! I believe that it was also produced by the printing machine used to dispense the card, as opposed to being manufactured by the vendor (with the GO artwork as part of the card stock). All-in-all, a great card (key) to have!

As for the card/key that Jim Silva is showing, I recall being at the Wynn (within 24-hours of the GO) and I stopped in at one of the gift shops. They had gift cards, with the "Wynn" signature logo on a brown card. I don't recall it being metallic, just a flat brown. I did not get one as they had a minimum requirement of $25 to be applied to the card. I like chocolate, but not at Wynn prices.

I've not checked back to see if they (Wuynn or Encore shops) continue to carry gift cards.

Jim