I don't know for Dolby Prologic but the good news is that
hrydgard has began to develop for the futur emulation of the sound for Wii games (Rev 1101). Maybe soon, we will have sound in Wii Games. I hope it.
__________________
CPU : Intel Core 2 Duo E6300 1.86Ghz
Video Card : 8600 GTS
RAM : 2 Go DDR2
OS : Windows Vista Business 32 - SP1