ZFS + snapshots !?

[albinootje]

hi,

i read about ZFS, and i am using it now on a machine with a pretty
recent 7.0-CURRENT,
and i am very happy and excited about having ZFS in FreeBSD, it's awesome !

i have tried some things from the excellent quickstart-list here :
http://lists.freebsd.org/pipermail/freebsd-current/2007-April/070616.html

everything works great, except i cannot find any .zfs dirs when i try to
use snapshots

[ root at testbak:~ ] # uname -v
FreeBSD 7.0-CURRENT #6: Mon May 14 13:21:36 CEST 2007 [cut]

[ root at testbak:~ ] # zfs list
NAME                USED  AVAIL  REFER  MOUNTPOINT
backup1            3.14G  43.9G  3.14G  /backup1
backup2            14.0G  32.8G    18K  /backup2
backup2/swap         16K  36.8G    16K  -
backup2/ufs        3.83M  42.8G  3.79M  -
backup2/ufs at today    41K      -  3.79M  -

[ root at testbak:~ ] # zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
backup1                95.5G   6.28G   89.2G     6%  ONLINE     -
backup2                47.5G   3.98M   47.5G     0%  ONLINE     -

zfs create -V 10g backup2/ufs
newfs /dev/zvol/backup2/ufs
mkdir /ufs
mount /dev/zvol/backup2/ufs /ufs
zfs snapshot backup2/ufs at today
mkdir /ufs-today

mount -r /dev/zvol/backup2/ufs at today /ufs-today
gives this :

mount_nfs: path at server syntax is deprecated, use server:path
and later
[udp] today:/dev/zvol/backup2/ufs: RPCPROG_NFS: RPC: Port mapper failure
- RPC: Timed out

what am i doing wrong concerning the snapshots and .zfs dirs which i
don't find ?