Thanks everyone for your kind help!
Since I am setting this chroot environment as an experimental area
(maybe I'll install sid there), security is not a big concern.
Therefore I used Andreas' solution: modify /etc/init.d/sysklogd to
SYSLOGD='/var/chroot/dev/log'
and restart syslogd.
I am going to look into the --bind option of mount.
Ming
2003.05.31