I have a small character (Ratfolk) with Strength 8 and the Throw Anything feat which allows me to throw any objects I have on my person with alarming accuracy.
You are used to throwing things you have on hand.
Benefit: You do not suffer any penalties for using an improvised ranged weapon.
What sort of damage do these objects do and what is the heaviest/largest/most damaging object that I can throw?
My Findings So Far
The improvised weapon rules give some basic guidelines for damage, but doesn't give any limits on what can actually be thrown and weapon weights and damage don't tend to correlate a great deal.
To determine the size category and appropriate damage for an improvised weapon, compare its relative size and damage potential to the weapon list to find a reasonable match.
It might seem reasonable to base the damage off of a club (or greatclub) with 1D6 damage for a 3lb object and 1d10 damage for an 8lb object as a baseline. Do improvised weapons have a 'size' though. Are all thrown items considered to be small because the character is? If not, then is there a penalty for throwing an oversized object?
The carrying capacity rules give a limit on how much a character can lift over their head (and then could potentially throw), but this would be a generous assumption, letting the character throw something of up to 60lbs.
A character can lift as much as his maximum load over his head.
But this doesn't quite agree with the Strength rules which suggest that a Strength 8 character "has trouble even lifting heavy objects".