I rarely venture into, much less dwell upon, box-office cheerleading, but you have to pay tribute to the worldwide monster haul of Sam MendesSkyfall, which doesn’t even open here until Friday. The 23rd film in the 007 series pulled down a wowser $156 million this weekend, which puts the 10-day overseas total at $287 million. If that’s not staggering news, it’s fairly close to that. And the Skyfall revenues have given Sony Int’l its all-time biggest year ever — $2.6 billion through today. Overall Sony has sold $3.6 billion in movie tickets and a shot at reaching its first $4 billion year ever.