I have a Matrix Orbital LCD display in my pc which has 8 general output registers that can be turned on and off via software (you can write your own like I did if you want). They supply up to 750mA on the pins.
I have a few super bright leds in my case which I have flashing on a off, depending on the cpu usage & hdd usage. You might be able to control a servo with the LCD, but I'm not sure. I thought about it as I have some spare Remote Controller Car servo's but due to the high resitance in turning them, I decided they would probably blow my LCD so I skipped the idea.