Just got my n800, and just got NFS working.

What was necessary was roughly:

Installed rx-34-kernel-nfs-modules (need "red pill" mode for this, I believe).

Installed portmap.

Downloaded the nfs-common package, extracted the contents, and installed rpc.statd by hand (as well as a few other programs).

Downloaded the mount package, extracted the contents, and replaced the busybox mount/umount links with the versions from the package.

Inserted appropriate modules.

Mounted away.

I believe that rpc.statd and the other stuff from nfs-common is strictly optional.

I believe that one can even skip using portmap, if the "nolock" option is used when mounting NFS shares.

The real trick seems to be locating the rx-34-kernel-nfs-modules package, and replacing the "mount" program with a non-crippled version. It would be nice if someone would put together a package that made this a little easier.

Cheers,
Lon