Have you been trying to get winbind working on Ubuntu, and not having any luck? After the usual:

sudo apt-get install winbind

You also need to install libnss-winbind as well:

sudo apt-get install libnss-winbind

That should get it working, when combined with the change of the hosts: line in /etc/nsswitch.conf from:

hosts: files dns

to

hosts: files dns wins

And presto, it should start working.