Just noticed around Disneyland some D23 buttons are being given away. I stopped by every location that sells D23 memberships, and all I could find at Disneyland were:
Huey, Dewey, and Louie,
Mickey and Minnie,
Tweedledee and Tweedledum,
However, a quick search on eBay shows that there is also a Lilo and Stitch button to be found. Maybe Disney World only?
I'll add these to my D23 Pin/Giveaway chronology!