OK well I can now say that I've tested the driver myself, and with a little help from DiegoMax in finding the outputs (mine were on channel 3 & 4) and although audio lost sync after a while, it definitely works well enough to call a successful alpha build. Brilliant effort

[edit] tested on a creative CT4670 - [/edit]
further edit A.K.A This idiot's guide to the driver:
Run the installer.
Go to the Sound System Preference Pane & select your card.
Go to Audio/Midi setup (in Applications/Utilities) and "Configure Speakers" until you get a nasty hissing sound when you hit the test button.
Play some sound!
If/When the sound stutters degrades & dies, quit what you're playing in, open terminal & use:
CODE
sudo -s
(password)
kextunload /System/Library/Extensions/kXAudioDriver.kext
(if at this point it says "failed" just repeat the command above)
kextload /System/Library/Extensions/kXAudioDriver.kext
thos will bring it back so you can test further