Okay, thanks. I was starting to get the feeling I'd need a gyro to cancel out the centripetal force. I have a three axis gyro waiting to be put on a PCB that I could fire up this weekend, perhaps.
To avoid having to learn a beefier uC (I have only ever used 16F Pics), I may just use dual PICs for the setup -- some of the enhanced midranges that is that can run at 32MHz.
I think I'll use one for all the sensor measurements. I'll only use pitch and roll on the gyro, because if you are yawing on a bike something has gone terribly wrong. I'll do most of the math on one and send data over SPI at a quick clock to the other PIC that will control the servos, because I've gathered that precise servo control of multiple servos can be a fairly processor intensive undertaking. For that matter, I think I'll only need 2 servos to adjust the camera for pitch and roll.