Well, to add theoretical hardware solutions: if the LED is too bright, adding a simple resistor will do the trick. A somewhat neater if more speculative hack would be to add a passive low-pass filter which is nothing but a resistor and a capacitor. If you get it right, it would turn your blinking LED into a pulsing LED which is maybe less distracting and might look better. However, LEDs don't have a linear response curve, so you should prepare for the payoff not looking quite as cool as you would have liked. Also, I won't be held responsible for anyone trying this and bricking their mainboard.
The bright blue led illuminates my entire room at night; I know exactly what you're talking about! – Paul Lammertsma – 2010-03-27T15:08:36.850