One of my favorite sites for Internet audio is The Oyez Project. Here you can hear US Supreme Court arguments dating back to 1955 (when recording first began). The Bush vs Gore arguments are online there already. There something truly fascinating about listening to some of the most important issues in our history being argued before our highest court. I first discovered that Supreme Court arguments were taped when I read May It Please the Court: The First Amendment. The book covers 15 key free speech cases and comes with four cassettes of the actual arguments. It sounds dull, but it's not.
What does Oyez mean? It's what the clerk of the court says before court sits. It's a corruption of the Latin for "listen." Click here to hear the Marshall of the US Supreme Court announce the arrival of the justices.