So, I emailed the art thieves, and as a result, they deleted the auction with the stolen picture. (The link to that auction now became a link to a stolen image of Ed from FMA instead,
http://cgi.ebay.com/KINGDOM-HEARTS-2-PS-2-game-art-HUGE-PAINTING-SIGNED_W0QQitemZ230148811101QQihZ013QQcategoryZ187QQrdZ1QQssPageNameZWD2VQQcmdZViewItem )
EDIT - they actually sold a copy of my picture some time ago! AND they stole a bunch of other DA artists' works, check my DA journal:
http://azmin.deviantart.com/ Arseholes.