Don't know anything about trademark law, so Fox's suit is an opportunity for some research (and btw, go here and find the link to Jon Stewart's Comedy Central commentary on the suit; it's Friday, after all). If you want to delve into some electronic records, go to the USPTO site, here. (From Sadly, no!, via Pandagon.) A search today for "Shock and awe" turns up some strange stuff. Sony backed out, but lots of others didn't.
One lawyer has attempted to trademark the phrase "excellence in the pursuit of justice." And, in a funny coincidence that would make Justice Scalia happy, a trademark with the phrase "living constitution" (a logo for a political reform group, apparently) is classified as "dead."
MORE: I think I published an earlier version of this post and then overwrote it. I try not to do that (except to correct obvious spelling errors). Sorry!