A part of my series of videos detailing the many uses of Face Poser, a tool in the Source SDK on Steam. More information here:
http://katananokage.googlepages.com

UPDATE: Speech SDK link is back as of 02/03/09, check description

DISCLAIMER: While I will try to help people learn how to use Face Poser, I'm not the Valve support team. Chances are, I can't help with all the various error messages you may get.
For non-troubleshooting help, join the Steam Group:
http://steamcommunity.com/groups/faceposer

Microsoft Speech SDK can be found here:
http://www.microsoft.com/downloads/details.aspx?FamilyID=5e86ec97-40a7-453f-b0ee-6583171b4530&DisplayLang=en
The file is SpeechSDK51.exe. Download it, run and extract to a folder you'll remember, then run setup inside there.