ports and freebsd 4.11

[D G Teed]

Question: I read this in /usr/ports/UPDATE:

20070205:
  AFFECTS: all users of FreeBSD 4.X
  AUTHOR: portmgr at FreeBSD.org

  The remnants of FreeBSD 4.X support have been removed from bsd.port.mk.
  Any remaining users should _not_ get this or any subsequent updates.

Then I found this announcement:

http://www.freebsd.org/portmgr/policies_releng_4.html

What does that boil down to in end user English?
I can't build things in ports if I'm running 4.11, or that
I should never try to update packages from ports in 4.11?

--Donald