This is on Windows 8 Consumer Preview (Beta), but there's no reason to think this will change (unless it's a Windows bug, and then I should report it).
When installing the driver, Windows will report the error: "The third-party INF does not contain digital signature information"
From what I can tell, the driver needs to be signed to work on anything past Vista, but my 64bit Win7 machine is fine with the same driver that Win8 is rejecting.
Is there a way I can get past this, or is the signature there and somehow not valid (Windows problem?)?