I listened to McCreary and Roper tonight. They were pretty good. The only flaw with the podcast/audio system for these oral arguments is figuring out who is who. I know the voices of the Justices pretty well, but even I was getting hung up a few times. When C-SPAN has oral arguments on America and the Courts, they show a picture of the current speaker. I guess I've been spoiled by it.
Since I have an almost parasitic relationship with my iPod, I'm thrilled that more of this judicial material is available in mp3 format. I'll keep my eyes peeled for anything else and link it accordingly.