I'm a fan of artist Josh Agle (aka Shag) and this info was in the Shagmart newsletter which I received via email today:
"There are many rumors circulating regarding Shag's involvement in Disneyland's 50th Anniversary. We can confirm that he is in fact involved. He has been working with cast members at the resort on a series of collectible items based on his paintings celebrating the event."
Cool! I loved the stuff he did for the Tiki Room anniversary. Any other fans out there?