I have collaborated on several official Neil Gaiman projects.
The lockets were designed for Neil Gaiman via Black Phoenix Trading Post. They are a charitable venture for Match It For Pratchett, which is raising money to match Terry Pratchett's $1,000,000 donation to the Alzheimer's Research Trust.
The lockets are based on Neil Gaiman's stories "The Goldfish Pool and Other Stories", "Forbidden Brides of the Faceless Slaves in the Secret House of the Night of Dread Desire", and "Shoggoth's Old Peculiar". They are available for sale here.
In 2008, the Comic Book Legal Defense Fund and Black Phoenix Alchemy Lab teamed up with Newbury Award winning author Neil Gaiman to offer some amazing items at the 2009 San Diego Comic Con.
The proceeds of various exclusive, limited, or signed items went to the Comic Book Legal Defense Fund, which works to preserve the First Amendment rights of the comic community.
The Fool card was an exclusive Comic Con-only version of The Fool from Neil Gaiman's Fifteen Painted Cards From a Vampire Tarot. Each package included a 5ml bottle of perfume inspired by the tale and a corresponding tarot card.