Or sonic weaponry, in general. I'm playing a game set in the Clone Wars, and the Geonosians' unique weapons appear from time to time. How would you stat them up? It is clear that they cannot be blocked by lightsabers--how would they interact against a Jedi character?

There is a sonic rifle in Far Horizons. It deals stun damage, but the fluff mentions it can't be blocked by 'sabers, but I don't remeber if the stats back that up. So there's your baseline. The lethality of their sonic weapons can be justified by saying the dial has been turned to 11, so what normally simply disorients causes internal injuries (or whatever it is they are supposed to do).