Something to clarify here:

I'm not the developer of VoodooHDA and VoodooPS2Controller. I just did the compilation job for snow leopard. Thus I actually have no idea what could be the reason for any non-working things caused to you.

Any further request and debug information should go to: forum.voodooprojects.org

Also Slice is actively developing VoodooHDA (now 0.2.42) and added mic autodetect function. Check it here. As rals2007 requested, here is the first version of 0.2.35 source code (need nodes patch to get mic work) edited for 32/64 bit compilation:  voodoohda_patching.235.src.zip ( 284.64K ) Number of downloads: 2278


These two kexts are recompiled for snow leopard, support both 32/64 bit kernel. The PS2 source code is from Chun-nan (now eureka?) and recompiled by me. The HDA is from VoodooProjects and recompiled by avian from their forum.
Do not use them for 10.5 and below.
Do not use them with similar kexts for the same function, or a kernel panic may occur.
Install them with tools like kexthelper or use a terminal with copy and chown.
Try it on your own to see whether they work for you.
 SL_PS2_HDA.zip ( 282.38K ) Number of downloads: 5872


Update [2009-07-21]:
I recompiled VoodooPS2Controller as well for 10.6 32/64 bit. Its Nub part is abandoned, so you must use it with AppleACPIPS2Nub.kext in the same package. Voodoo.PrefPane is for configuration of touch Pad.
Again, do not use them with 10.5 and below.
 SL_PS2_Voodoo.zip ( 201.71K ) Number of downloads: 9109


Update [2009-08-09]:
The VoodooHDA compiled from vanilla source by avian give low max sound volume on my laptop. Based on other posts from this forum, I edited Table.c accordingly and recompiled the source code. Now the volume become normal. If you have the same problem as me, try this new kext for 32/64 snow leopard.
 VoodooHDA.kext.zip ( 157.52K ) Number of downloads: 8119


Update [2009-08-24]:
fassl from the VoodooProject released VoodooHDA_Pref source code two days ago. Thanks for that, I now compiled it for snow leopard 32/64. This version solved the low max volume problem on my laptop, thus I did not edit the file Table.c. Use VoodooHDA.prefPane for configuration. To reload the configuration at each boot, put voodoohdahelper into your startup item.
 VoodooHDA_Pref.zip ( 192.79K ) Number of downloads: 10530