Jerry Carter speaks in a recent LinuxWorld podcast about some of the new stuff going into current Samba releases. From the podcast's overview:

With the latest Samba, you can populate one group on a Linux system with some members from the local system, others from Microsoft Active Directory. Since it works a lot like local groups in Microsoft Windows, now Linux and Windows administrators will be able to share the task of managing users and groups.

The podcast is short and offers a heads up about ongoing work in Samba3 and serves as a preview of Jerry's talk at LinuxWorld's Open Solutions Summit in Februrary.