Deja Tube. It's that feeling that you've already experienced a show on television before. Back in May, I reviewed the original pilot of NBC's new superhero drama Heroes ... and I was rather lambasted as a result of my negative review. While everyone I know who saw the pilot in Hollywood absolutely loathed it, fans of the show (how can a show have virulent fans before it's even premiered?) lashed out and members of the production staff assured me that what I saw was drastically different than what was scheduled to air in September. So I thought: I've got an hour. I'll take another look at the series and tune in for the "new" version of the pilot episode ("Genesis"). I went in with an open mind, cleared out an hour of my schedule (and my TiVo) and sat down, fully prepared not to let my earlier feelings cloud my judgment. Guess what: the version NBC aired last night was only minutely different than the version I saw. (Still no sign of Leonard Ro