It sure looks like it. Look what popped up on our feed list:
Notice the post is by “Brent Buttsmell,” as opposed to Brent Bozell, the founder of Media Research Center who publish Newsbusters. The title is “9/11 WAS AN INSIDE JOB” and the text is “IT WAS OhBAMA!” That sure looks like a hack.
Going to the Newsbusters site right now shows that it’s down.
I haven’t found any chatter on the interwebs claiming responsibility yet.
Update: Newsbusters is back online and the hacked posts are gone.