VoodooHDA is an open source audio driver for devices compliant with the Intel High Definition Audio (HDA) specification, based primarily on code from the FreeBSD hdac driver. It is intended as an Intel-only replacement for AppleHDA on Mac OS X with support for a wide range of audio controllers and codecs.
All major VoodooHDA development for the past year has been going on from a Project OS X thread, so check that out for the latest source code and updates.
This page will be, at least for now, a resource to get installer packages which installs the kext for either 10.5 or 10.6, prefPane, Launch Agent, as well as an uninstall script for those who wish to roll back to their previous state after installing VoodooHDA.