Well, came back to this question, Googled, saw the FUSE manual, this post, then bindfs
which does exactly what I had wanted.
This usage worked for me:
bindfs -n ~+/src ~+/dest
Without -n, --no-allow-other
, then FUSE gave me an error:
fusermount: failed to open /etc/fuse.conf: Permission denied
fusermount: option allow_other only allowed if 'user_allow_other' is set in /etc/fuse.conf
Odd that it wants to allow other users by default.
It's available in Ubuntu 12.04,
sudo apt-get install bindfs