StreamOfTheSky
Adventurer
The races of stone powerful build ability blatantly specifies that it stacks with any abilities that increase size category. If he had the monkey grip feat he would be treated as a huge character for purposes of wielding weapons. Personally, this is broken. As a dm, I would make penalties. Example, there is no way to swing(Maybe even carry) a 30 foot sword in a room of almost any kind.
First of all, I recall monkey grip not stacking with powerful build for some specific reason. Even if I'm worng, monkey grip is a weak feat that only fools and people who don't mind being mechanically inferior if it means they can play a 12 year old girl with a giant hammer take. The -2 attack penalty is worth 4 damage via power attack, if not more with leap attack, as many will opt for.
Second of all, it's not broken. Goliaths have +1 LA and can't make use of enlarge person. Any regular human can suck down a 50 gp potion any given fight and get ALL the large benefits and drawbacks...like reach. Further more, in Magic Item Compendium, there are 6000 gp bracers that effectively give anyone powerful build in regards to weapon size. Obviously, you can't have powerful build twice, so this won't help the Goliath. Goliaths can use psionic tattoos of expansion to grow larger, but those are very costly (including x2 cost for a personal range power and needing at least manifester level 3 for it to have a longer duration than 1-2 rounds) and possibly not available if your DM hates psionics. So, assuming you're using the common splat books, since Goliath is IN one of them...a human actually has an easier time obtaining the ability to swing around a Huge weapon than a Goliath, without needing an LA.
/threadjack