Using Win7 x64 RTM and followed the instructions in the first post. Works fine.
Only problem is I must leave the setting to Auto in the audio deck. Won't work on 44.1 strangely (gives me endpoint errors in foobar). I have no idea if it is working through the wolfson on auto mode, 2 channels.
EDIT: Step 6 is not very descriptive.
a) Download & extract (you may need a compression program, I used 7zip) the 4.60b XP64 drivers.
b) In device manager, under "Sound,...