NFS exporting is supported on kernels versions >= 2.6.0.  For 2.4.X
kernels the exporting infrastructure is not refined enough, so don't
expect this to work.

You need to add an fsid=NNN option to /etc/exports to make exporting a
FUSE directory work.

You may get ESTALE (Stale NFS file handle) errors with this.  This is
because the current FUSE kernel API and the userspace library cannot
handle a situation where the kernel forgets about an inode which is
still referenced by the remote NFS client.  This problem will be
addressed in a later version.