I have one, and overall I'm quite pleased with it. There are however several issues which need fixing before everything works.
The NForce2 network driver does not support dhcp, and dies after a while.
There is currently no AGP support in the agpgart LKM. (I understand that there is in 2.5)
In order to get USB to work I have to use the fnk kernel patchset (2.4.20-pre4 is the latest), which also has a patch allowing DMA drive access. (you need both ehci-hcd and usb-ohci for USB 2+1.1).
Currently, ALSA does not support the SP/DIF outputs and inputs on the onboard sound card. The NVidia driver (OSS) does though.
Integrated GeForce4MX works fine the NVidia's drivers, but is fairly slow.
I have no idea about SATA, although I expect a patch would make it work. (the chipset by Promise [pci id=3375]
I've not tried SMBus but I think it works with the latest CVS lmsensors.
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Hope this helps.
Matt