We have no idea. Maybe they're assembling a list to blast in advance of screening their upcoming video of a U.S. air strike in Afghanistan, or looking for people to speak out about the incident? Or maybe they're just going to email everyone in the military and ask if they have any incriminating videos lying around that they'd like shared with the world? (Good luck with that!) Or maybe they just want us to write about them (mission accomplished) which is certainly possible given Wikileaks' flair for the dramatic.
Update: Wikileaks' founder Julian Assange responded: "Not yet."