NFS for TQ2440 is not a separate topics that can be explained in a single tutorials. We will start a serial of tutorials of explaining how to port linux to TQ2440 and explain the details of how to make file system, write drivers, and write application program of linux. This serial consists of 27 tutorials. Please keep an eye on it.
They can be found in the following:
http://www.cutedigi.com/articles.php?tPath=8