The tutorial series from Simon Monk is a good place to start. If you look around in the Adafruit Learning System, you will see lots of other great Arduino projects too:http://learn.adafruit.com/search?q=simon+monk
Thanks! After I posted this, I started to look around the site and saw the lesson 0. I have now downloaded the software for my Mac and was setting up the serial port, but none of my options look like the ones in the lesson. All of my options have /dev/tty.bluetooth-PDA-SYNC or /dev/tty.bluetooth-MODEM. I wonder why I do not have a USB option.
EDITED: I figured the serial port out. Thanks!