via the Situation Room Blog,

At 5:34 of the first period in the Phoenix Coyotes/Pittsburgh Penguins game, the NHL Situation Room initiated a review to determine if Jussi Jokinen's shot at 8:09 of the first period crossed the goal line. Video Review conclusively determined that the puck had crossed the goal line. According to Rule 78.6 "When a team scores an apparent goal that is not seen by the on-ice officials and play continues, the play shall be reviewed by the Video Goal Judge at the next stoppage of play. If the goal is confirmed by video review, the clock (including penalty time clocks, if applicable) is re-set to the time the goal was scored. Good Goal Pittsburgh. The clock was reset to 8:09.

Watch the goal below and notice the ref was in good position but did not see the puck go into the net...