I'm guessing the missing 2 pins are for a backlight, which mine lacks.
You don't have any missing pins. Actually it's the other displays that have two extra pins (for the backlight). The Hitachi LCD interface upon which all else is based uses only 14 pins.
On the datasheet is lists pin 3 as "VEE", while in the tutorial I'm using it is listed as "V0", which is the variable operating leg of the pot for the backlight (I think). Is this correct? If so, what do I do with the pin? Ground it?
Its not for the backlight. Pin 3 is almost always the power for the LCD display itself (as opposed to pin 2 which is the power for the LCD controller). This is the pin that should be driven by the wiper of the potentiometer. Many LCD modules, including many of the Optrex displays that I use, work satisfactorily with this pin grounded although they work better with a slight positive voltage.
Your tutorial is a bit outdated since it does not mention lcd.begin(). This means it was written for a LiquidCrystal library that predates v0017. If you run a later version of LiquidCrystal without that function the library will default to the setup for a one-line display (AARRGGHH).
Your datasheet link points to several similar LCD modules. Unfortunately the differences are in the letters following the the basic part number and those letters often deal with characteristics that may change the voltage required on pin3. Specifically, extended temperature range devices, like some of my Optrex modules, require a negative voltage on pin 3. You will find out if you don't get a row of blocks when you hook up power (pins 1, 2, and 3).