Chase: Do you mirror your displays or have separate content on each? If not mirrored, do you get the dock on both screens?
No, mirrored displays is useless really.
If you just plug in the monitor to the MBP, it will act as an extra desktop space (the MBP display won't change). There is no Menu Bar and no Dock on the external monitor... just extra screen real-estate.
After you've plugged it in, go to System Preferences -> Displays and you can align the displays so your mouse flows seamlessly from one display to the other.