Finally! XNU-1456.1.26 sources are out, available to anyone! :-D That's great news! There is also an update for snow -the 10.6.1 version available via "software update" only.
About my system:
Motherboard: Supermicro H8DAE-2 with nVidia MCP55 Pro chipset which supports up to two Six-Core AMD Opteron 2000/8000 processors
Super Micro Computer, Inc. - Aplus Products | Motherboards | H8DAE-2
Processor: 1x Opteron 8214
Ram: 4 GB Samsung DDR2 667 Registered ECC Unbuffered
Graphics Card: Nvidia 9400 GT
I also have two SATA hard disks, 120 GB and 640GB , a Sony IDE DVD reader and an Optiarc DVD Recorder.
Waiting to arrive the 2xOPTERON 2350 CPUS and 2x2GB Samsung DDR 667 Registered ECC Unbuffered modules