I've been trying too... no luck so far... I would recommend a cheap option if available in your country, the AsRock 945GCM-S very compatible and stable...
I believe I had to mod the BIOS or downgrade it.

I'm currently running iDeneb 1.5 Leopard 10.5.7 with AnV Kernel

AsRock 945GCM-S
Intel Core2Duo
2GB RAM
nVidia 7300GT
Lan works with kext from realtek
USB wireless based on Ralink 2500

All pro Applications run 100% ok...