http://www.ds4free.com/default.aspx?r=63571. its by offercentric, who have had sites for free mp3players dvr's and pvp and have shown to be legit. people on other forums have gotten their free stuff from them. you have to sign up for an offer, trial, then have to get four people to do the same. blockbuster trial can be canceled on line and you usually receive credit within a couple of days. or you can also sign up for free aol trial.
this is a good site to go to if you have any questions about this sort of thing and wonder if these things can be legit http://gearlive.com/forums/viewforum.php?f=13&sid=eaf7922e977e2c3b80aa46995ce624c0