I just got a Wacom tablet off of craiglist and I totally love it.  For those not versed in computer peripherals, a Wacom tablet is this drawing pad that comes with a pen stylus that plugs directly into the computer and is pressure sensitive so that it can simulate drawing more realistically.  If i press hard, it does thick lines; if i press lightly, it does thin lines.  This particular drawing is some concept art so hopefully I'll pump out a couple more of these soon.