It'll get caught up in the whole day trading of bitcoin and you need something super popular to stabilize the price. If Diablo 3 had decided to use only bitcoin instead of only PayPal, then that would've done it.
Hmmm... considering your avatar is a furry, perhaps you should play on that. The ideal furry place is where they can roleplay, yiff, and then do really disturbing & bizarre yiff stuff, and then they can leave the world and claim they merely like the art and only 1% of furries are into yiff and they're just a dignified furry not into that.
That would not -stabilize- the price. First it would move it way up as people discovered the development. Then up more as people speculated on how many other large games/companies would accept coins. Then down if time passed and more did not or up if even more if others were getting in.
I wouldn't hold my breath waiting for stability.
It should. Make online games that are item based where you have to treadmill for items and gold. Then have a system where they buy and sell virtual items, real estate, and characters with bitcoins. The more it is used for commerce, the more buffers keep the Gox stuff from controlling the price.