questions about chaining RGB LED+servo modules using WS2801 chips.. control?

the specific type of servo is less of an issue, i can also use a regular RC mini servo that has 3 wires, all i need is for the motor to turn forward and reverse.

the reason i mention the WS2801 chips is because they can be chained together for use with 3 channel LEDs, can it also be used to drive a small servo forward and reverse?

is there any other chainable chip that can drive LED's and a servo (maybe 6 channel)?

thanks!
-Mickey