Hey all,
I just did a fresh Lion install with Unibeast. Here's what I did to get the sound working. I haven't tested anything but rear line out but that is better than what I had, and it's really all I need.
1. Use Multibeast to install the most recent VoodooHDA (as of this writing VoodooHDA 0.2.7.3). You can find that under Drivers & Bootloaders>Kexts & Enablers>Audio>Universal>VoodooHDA 0.2.7.3
2. Rerun Multibeast to repair permissions - System Utilities>Repair Permissions.
3. Restart
Now I had sound but there was a really annoying and loud hiss. Here's how I got rid of it, courtesy of tonymac user pbarbosa on this thread:
http://www.tonymacx86.com/viewtopic.php?f=79&t=18309 (I clarified his instructions a bit)
4. On your Mac, go to to /system/library/extensions --> VoodooHDA
5. Right click and Show Content
6. Open "content" folder
7. Drag the "info.plist" file you find in there to the desktop
8. Open it with a text editor (I had to unlock the file) and then search and change the iGain and iMix values to 10 and 30
You want to make it look like this (all you need to do is change the numbers)
<dict>
<key>iGain</key>
<string>10</string>
<key>iMix</key>
<string>30</string>
</dict>
9. Copy your edited info.plist file back into the folder you got it from, and overwrite the old file.
10. Run Kext Utility or repair permissions.
11. Reboot.
The hiss was gone for me. Hooray!