Lawrence Lessig discusses the oral arguments in the copyright extension case on his weblog.
The most important first indication that was absolutely clear from the argument is that our fear was misplaced. The Court clearly got it. Though the other side had written literally 300 pages trying to show all the good CTEA did (and pronounce it like it is a disease -- sateeeya), the Court hadn't bought any of it. Congress was not acting to promote progress, it was acting to reward "court favorites." The only question the Court was struggling with is whether it has the power to do anything about it.
Now pause for a second to think about how important and good this struggle is. First: It is a rare but valuable exercise for any branch of government to worry about the scope of its own power. And the greatest virtue the Court exercises is the virtue of self-restraint. This is a reason to respect the Court, not criticize it (though how they exercise their restraint, or where, can be criticized, as I suggest below). But the general idea that it will restrain itself, despite believing a law is stupid, is a feature, not a bug in our constitutional tradition.