CNN got hold of the details and actually contacted some of the people from it so i guess it is legit then
http://money.cnn.com/2011/06/02/technology/sony_lulz_hack/?section=money_latest
CNNMoney contacted several of the people whose e-mail addresses were listed in the Lulz documents. One replied that her account, which she created to enter a contest, had been hacked.