Making a 5x5x5 led cube and need help!!

Im making a Led cube so i need held controlling 125 leds with the Arduino Duemilanove.. need help on how many resistors (and values) , Transistors (to multiplex) and so forth.. im not asking you to do the work just point me in the right direction ..thanks

Well it's a little dated, but did post about my 5x5x5 cube project.