Adafruit Industries Adafruit Industries RGB Positive 16x2 LCD + Keypad Kit for Raspberry Pi
With this in mind, Adafruit devised a Pi plate that lets you control a 16x2 Character LCD, up to 3 backlight pins AND 5 keypad pins using only the two I2C pins on the R-Pi! The best part is you don't really lose those two pins either, since you can stick i2c-based sensors, RTCs, etc and have them share the I2C bus. This is a super slick way to add a display without all the wiring hassle.
Adafruit Industries RGB Positive 16x2 LCD + Keypad Kit for Raspberry Pi
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