Here are the commands needed to get a current copy of the developer sources. You may want to jump forward to the next panel to read the explanation of these commands, and then jump back here:

# cvs login
(Logging in to cvs@pserver.samba.org)
CVS password: (enter password here)

# cvs -z5 co samba
U samba/COPYING
U samba/Manifest
U samba/README
U samba/Read-Manifest-Now
U samba/Roadmap
U samba/WHATSNEW.txt
(this is just a snippet of the complete cvs co output)