Apparently this binder that was on display at Bronycon is actually the prototype of a folder they are planning on releasing for all you card collectors out there. I wouldn't call it the finalized art, but I would be completely OK with this. Also Derpy.
I've been told to expect it for order some time this summer by one of the writers, but don't quote me on that.
And on the left is the sheet they had up at Bronycon for the charity auction. That is a ton of pony right there.