Either you need to be able to move the entire board assembly, or you need an flexible extension cable from the Blackfin board to the camera.  There are a couple of spare PWM outputs that share pins with UART1 that could be used to drive servos, but finding a suitable extension cable is the main challenge.  I'm not certain what the cable length limits would be, but 2-3 inches would probably work okay.

Quote from osmogr on 02/02/08 at 7:14pm:

 
I'd be very curious how this worked out as I will be attempting a similar thing soon as well.  My idea was to just move the whole board assembly (as it will fit on the pan/tilt) but I may change my mind.  I'll also have to look into the specifics of accessing those two other PWM channels.

The 's' command will allow us to set the position, but not increment it (like the '+' and '-' commands).  I can either adapt the firmware for these new commands (I'll really need 4 for pan and tilt), but then I would ideally want to capture the response from the robot indicating what position they are currently at.  The other option is to somehow (I'll brush up on my javascript) keep the current position values on the client machine: the buttons increment and decrement these values and then the full 'sXX' command to the SRV.
 
The latter seems easier, but somehow more of a hack.
 
Along the lines of pan/tilt, what is the easiest way (in your opinion) of accessing this S32 bus?  I could solder directly to the board, but I'm just checking to see if there's a better way.
 
I wish my servos had come today (Servocity got an annoyed email for taking >8 days to deliver on 3 day shipping), but they didn't so testing won't happen until at least this weekend or next week.

I used a pan & tilt assembly to move the entire camera using the other two channels and it works quite well.
 
If you're interested,  this is a link to a short video I took of the P&T in operation:
 
http://www.youtube.com/watch?v=8T66qmsbo_0