I know this isn't exactly Mac-related, but it's relevant to this thread nonetheless. Plus I know some of you like to dabble in non-x86 machines of other kinds (Looking at you, @z970mp ).
It looks like SIL3112 cards flashed with WiebeTech's firmware also work in SPARC-based Sun machines. Here's a picture of one being picked up just fine by OpenBoot (Sun's OpenFirmware) in my Ultra 10:

(Yes, I know I have to fix the darn IDPROM)
However, it seems no version of Solaris ever had drivers for the 3112, so the installer can't find a single disk.
It probably works under GNU/Linux and *BSD, but I haven't been able to test those yet.
It looks like SIL3112 cards flashed with WiebeTech's firmware also work in SPARC-based Sun machines. Here's a picture of one being picked up just fine by OpenBoot (Sun's OpenFirmware) in my Ultra 10:

(Yes, I know I have to fix the darn IDPROM)
However, it seems no version of Solaris ever had drivers for the 3112, so the installer can't find a single disk.
It probably works under GNU/Linux and *BSD, but I haven't been able to test those yet.