There's some initiatives for MMORPG's with bitcoin but I haven't seen anything good and/or working properly yet.
That time will come I'm sure.
I would love to help fund and create an mmorpg but I think it'd be better if we just made btc as one of the options of payment. Making the theme as bitcoin would limit the player base.
If anyone wants to do an mmorpg like this that maybe has the graphics like browserquest I'd be interested in working on and funding part of it...