The sound of the S&P pit and some other commodity pits are available to all of us at around 100$/mo and only 3 days of trial :(
This should be very useful for intraday traders but it will take some time to get used to the live comments of Ben Lichtenstein. Here are some examples:
Pit Comment: 30/70 means : S&P futures contracts bid/offer is 1269.30 /1269.70
Pit Comment: 8 half bid, 9 even offer means: 1268.50 bid /1269.00 ask
Pit Comment : paper buyin' - the retail is buyin'
Pit Comment: locals buyin' - the locals are buyin'
[UPDATE 5-Dec-2008] Now you can also watch it on youtube.
[UPDATE 23-Feb-2009] Some tutorials about tradersAudio.com can be found here