Mimoco has this Harley Quinn USB flash drive on offer at this year's San Diego Comic Con, but you'd better act fast, because much like the DC Universe as we know it this thing will be gone before you know it.
Their are only going to be 800 of these bad girls, styled after Harley as she appears in Batman: Arkham City. They will be sold booth #4398, for the five minutes or so that they last.