In some email I received from Justin T. Gibbs, sie wrote:
[...]
> Samba isn't quite enough though.  I don't know of any publicly released
> software that gives you the ability to generically "mount" a remote SMB
> volume and challenge each user on the system for their password when the
> attempt to access it.  I've never read the spec, but I thought that the
> protocol assumes a single set of credentials per machine, so it's very
> difficult to get SMB to behave in the same way as NFS.  I know that
> Novell had to jump through some serious hoops to get this to work in
> Unixware.

Linux 2.0 has SMBFS.

Darren