If you are mounting multiple NFS exports from the same server and you are having trouble dealing with the naming convention, use NetInfo to create multiple hostname entries for this server.
For instance, I have an MP3 export and a backup export on my Linux 7.2 machine. I mounted the MP3 export first, and the mount was named servername. Then, I mounted the backup export, and the mount was named servername-1. My iTunes library would break if I mounted the exports out of order.
To alleviate the situation, I fired up NetInfo Manager and duplicated the entry for '/machines/servername' and renamed it to '/machines/servernameMP3' and now there is no conflict between NFS mount names.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20011213152413250