> Does dt or X support any other resolution than 640x480 ?

Sure.  It works with whatever the primary resolution for a device is.
I'm using a Q700 w/ no internal video and with a two-page display
(monochrome) display.  dt and X work in 1152x870 (w/ a small patch to
grf_iv.c).

> And the last two questions, is there a function like the shadowpasswd
> under SystemV ? Or is in BSD a different solution for the crack-problem?

BSD stores an /etc/passwd and /etc/master.passwd:
-rw-------  1 root  wheel  5005 Jan 18 15:06 /etc/master.passwd
-rw-r--r--  1 root  wheel  4118 Jan 18 15:06 /etc/passwd

The master.passwd file actually contains the encrypted password and
/etc/passwd does not.  This and the /etc/pwd.db and /etc/spwd.db files
are why you should use vipw to edit master.passwd--the system will keep
those four files in sync.

-allen

-- 
              Allen Briggs - end killing - briggs@macbsd.com