I successfully completed my hardware "hello world" using this guide:
Now I'd like to move on to bigger and brighter things, more individually controlled LEDs that is! Obviously, the next step is to move the voltage source off of the Raspberry Pi and to add more LEDs, but eventually I am going to run out of GPIO pins, so I guess what I need now is to control a circuit which will somehow know, based on GPIO "coded signals", what LEDs to turn on and off. What sort of circuit examples should I be looking for? And more importantly vis-a-vis the Raspberry Pi, could it or rpi.gpio cause any problems, perhaps regarding signal timing?