Ok I've been fiddling and found a workaround - with AutoHotKey I can pipe the key output from AAI to do whatever script I want. So I've got it set to move the mouse by outputting a "j" and then AHK moves the mouse when the j key is pressed. Bam. Camera control achieved.
I'm having a little difficulty with making nice, fluid motion, though - I was hoping I could turn right as long as I was playing a certain note, for example. And I've got a script that, so long as I hold "j", the mouse continues to slide right at a constant rate. But when I try to use AAI to send a "j" to move the mouse, it seems to only send and release one "j" instead of holding it down, even though I'm using the "holded" type, and the mouse stops moving. Is there a way to "hold" a button down for as long as the corresponding note is being played? Thanks!
EDIT: I think I fixed it - I think it was a problem with my script and not the app. Camera control is starting to feel pretty smooth! This is really cool!