Louis CK has a new audio standup available to purchase on his website called "Word: Live at Carnegie Hall". It was material he performed back in 2010 during a tour and some of the jokes appeared on his FX tv show called Louie. It costs $5.00 and you can pay for it using either PayPal or Amazon. I've animated a few of his jokes before so if you liked those you should check it out!
http://buy.louisck.net/ – There's a free preview you can listen to as well