How does that work with our good friend Master Thrower?
EDIT: Sadly, Palm Throw doesn't look like it stacks with Manticore Sting. Pity. Still, it does stack with Two with One Blow and Palm Toss, which are lovely.
You know, once my schoolwork calms down, I have half a mind to write a handbook on volley attacks (of which, I think there's just Splitting, Manticore Sting, Manyshot, Palm Throw, and some stuff in d20 Modern. I'll go over what good sources of damage, nice stuff that adds to single attacks, and the like.)