NFS(?) file sharing from user account

[spradlin@Princeton.EDU]

Hi,

If I have two computers: A (where I am root) and B (where I only have
a user account), is there any way to share a directory between them
over the network?

Even if I run an NFS server on A, I can't mount it from B because only
root can mount.  And I've tried setting up the "user space NFS server"
to run on B but it apparently needs to run as root (although perhaps
I missed something).

I just want to have some way of accessing a common directory from A
and B (preferably over an SSH tunnel).

Thanks,
Marcus