I have read your article about running a linux X server on NetBSD.  I had the same problem.

My solution was;
/dev/tty0 seems special, then you have to link /dev/tty0 to /dev/ttyE0.  And if you have one wscons terminal, a linux X server will use a terminal next to the last terminal, that is No.2 in this case.  Then you have to link /dev/tty2 to /dev/ttyE2 

Again, if you have one wscons terminal,
# ln -s /dev/ttyE0 /dev/tty0
# ln -s /dev/ttyE2 /dev/tty2
if you have 4 wscons terminal,
# ln -s /dev/ttyE0 /dev/tty0
# ln -s /dev/ttyE5 /dev/tty5
 
----------------------
K. Takai (kazuhiko_takai@anet.ne.jp)