How about on MacFUSE? I remember there being some issues there. In fact, I'm now using an SSHFS that is *not* a FUSE module, but a pretty nicely done independent implementation.
plan9port works well with FUSE.
It works less well with the 9p module.
Assuming you have write permission on /mnt/acme
and FUSE installed,
acme -m /mnt/acme
should work just fine.
Russ