The best write up (other than those here on PTR) about this Feud (well at least a feud on Stern's side) is at the link on ESPN by entitled "When Is The Rematch: Stern vs Popovich" by Scoop Jackson. A couple of the quotes from the article:
"Both men have solid ground to stand on, and both did what's in the best interest of what they have power over. The interesting and ridiculously intriguing variable in all of this is how this will play out later this season as a high-end exercise of one man (Stern) showing another man how much power he has and the other man (Pop) showing/proving that he really doesn't give a damn."
"So welcome to the NBA's new saga: Suits Gone Wild. Grown men on the onset of a battle to prove who has the power to do what to whom. They say in life that two rights don't make a wrong, it just makes things even.
Well, whoever made that phrase up didn't know these two. They had no clue that the rights of David Stern and the rights of Gregg Popovich would reach this impasse. Because when Popovich sits Duncan and others again this season, and history says he will, it won't matter whether the opponent is headed to the playoffs or the lottery, and it won't be even. One man will be left standing, one with a clearer understanding of who the other one really is.
Someone will win. Someone is about to leave an indelible and undeniable imprint on just how much power he's actually got. And just how much the other one doesn't."