No; I'm not quite sure how I'll do pans yet, but that would be a change on the y axis. Hopefully I'll be able to peg an optional variable onto the end of the set-camera-* sexps, which will be the time it takes to complete whatever you asked it to do.
So, to do a pan 45 degrees to the left, you'd say something like:
set-camera-rotation
-- 0
-- 45
-- 0
-- 5000
With the two 0s being replaced by the current camera x and z rotations.
Another possibility would be change-camera-rotation, which would rotate the camera from its current position by however many degrees you specify (relative rather than absolute, in other words).