I've integrated the audiols driver into build 124 (actually I think this might have been the first push into snv124 -- thanks to jmcp for approving it so quickly!) From my HEADS UP message:
The push of CR 6875005 introduces support for audio for Creative Audigy LS devices. If you have such a device, you can now enjoy audio playback and record support using your audio device.
Devices supported are identifiable by the PCI id pci1102,7. Known compatible devices include Creative Audigy LS, Creative Audigy SE, Creative Sound Blaster Live! 24-bit, and Creative X-Fi Extreme Audio.
This driver includes 5.1 surround sound support.
Bugs for this driver should be filed in bugster using solaris/audio/driver-audiols.