As for the time being?
No.
Will someone make that?
It highly depends on the developer imo, but I think we will see it in the upcoming year.
Alternative?
Probably those Mayflash USB dongles.
I heard Wii U has the slightly same processor as PPC G3, Does anyone thinking about make it possible to run Mac OS 9/X on the Wii U? (I have no idea what's inside the espresso CPU..)