Mark Rothman is one of the best writers of situation comedies and screenplays around. He'll tell you some of his other credits when you read his new blog but I first knew of him when he was a writer and sometimes show runner on The Odd Couple, Happy Days and Laverne and Shirley.
In the seventies when I was a story editor on Welcome Back, Kotter, there was a day when I was up at ABC and a top executive came up to me and started telling me that the opening of last week's episode was kinda slow. It took a few minutes for us to figure out that she had her Marks confused. Despite an utter lack of physical resemblance, she thought I was Rothman and was talking about the previous Tuesday's Happy Days. I said something about how I wished I had his success and/or pay grade.
Anyway, Mark has just launched a weblog. He's a funny guy so it stands to be a funny weblog. Go take a look. And tell him to "Sit on it!"