The Batman MP3 player definitely stands out, though we aren't entirely sure why you would want one like this without a bat car :) The Batman MP3 player has 128MB of internal memory for storing up to 2 hours of MP3 music and has also has direct recording ability.

Comes with earbuds, the "batman" neckstrap, USB cable and stereo line-in cord. It's claimed to play for about 10 hours on "AAA" battery. The LCD is backlight and glows amber at night. Well. Sure, why not, if the Borg can have their own MP3 player then why can't Batman have one? It's available from here for US$49.99.