serielle console/headless clients

[ronald]

hi
following the last discussion about headless clients.

one question:
are there differences between the setup for a serielle console (esp. 
catch kernel panic's)

http://searchopensource.techtarget.com/tip/0,289483,sid39_gci1118136,00.html

and
the setup for headless clients ?

thx.
ronald