Or a 74HC165 parallel to serial chip for the keypad
and a 74HC595 serial to parallel chip for the LCD.
http://arduino-info.wikispaces.com/Popular-ICs
...just fixed the link in there... sorry!
Take a look at the Arduino libraries for ShiftIn and ShiftOut: http://arduino.cc/en/Tutorial/ShiftOut
DISCLAIMER: Mentioned stuff from my own shop...