[Samba] Unix ADS group membership or vice versa

[TC Hough]

Hello,

I have a Samba server set up as a member of an Active Directory domain. 
Authentication works great and my Windows users are able to log on to the
Linux workstation without any problems.

What I'd like to do is set up some of my local Unix accounts as members of
ADS groups.  Is this possible with Samba?  If not, would it be possible to
make an ADS account a member of a local Unix group?

I'm running Samba 3.0.22 that comes with Ubuntu 6.06.

Thanks in advance!
TC Hough