Back in the day I added a bonus weapon WEAPONBAB because I needed it for one of my characters. I don't think it ever got added to the documentation and I'd forgotten about it 'til you asked.
Since it's weapon based it affects attack iteration but only for the weapon it's applied to.
As far as I know it's still in there
Hmm, not sure if that's any help.
That's exactly what I needed! By adding "TEMPBONUS:EQ|Unarmed|WEAPON|WEAPONBAB|MonkLVL-BAB" to the Unfettered Kata Edge, I have a Temporary Bonus that can be applied that does, indeed, increase the BAB of unarmed strikes including attack iterations. The only catch is I had to actually grab and equip an "unarmed strike" from the inventory tab. But using this I can make the "Special BAB" for other weapons. Thanks Andrew!
Code Monkey - Andrew Wilson