I don't know about during installation, but post-install, fire up the Authentication Configuration applet from the "System Settings-->Authentication" menu. Choose "Authentication" on the top tabs, then check "Enable SMB Support." Make sure you set your SMB settings for workgroup/DCs from the "Configure SMB..." button.
This worked for me using an NT 4 domain, but as JCCyC pointed out, AD support isn't quite there yet.
Yesterday at Linuxworld some guy int the Microsoft section gave me a CD for Vintela Authentication Services. Some product that is supposed to do what your wanting. He didn't have a very convincing story, but it might be something for ya.