Now that you have it working, if you are doing more then just playing a bit with it please be sure to use a TCP mount and not a UDP mount. Particularly between FreeBSD 7 and any recent DragonFly. A DragonFly client is capable of queueing upwards of 50+ RPCs to the server concurrently and UDP mounts will blow up (basically throw data away due to the socket buffers not being anywhere near large enough, causing stalls).
-Matt