It seems like I wasn't the only one who's imagination was captured by the locket from The Illusionist. At EBay bidding is currently at $81 on a little trinket that doesn't even open like the real one does... it just "gives the illusion that it can be". And then the listing ends with the motto: "nothing is what is seems". I guess that's mystical talk for caveat emptor.
UPDATE: Amazing. Final price on the auction was $285.00. To be blunt, the thing looks pretty crappy.
UPDATE 2: Here some other posts on this subject:
How to Build the Locket from The Illusionist, pt 1
How to Build the Locket from The Illusionist, pt. 2