Just in case you are interested, you can get a server for NFSv4 which I'd
consider at Beta test stage anonymous ftp from:

snowhite.cis.uoguelph.ca (131.104.48.1) in pub/nfsv4
(It currently runs in a slightly modified OpenBSD2.6 kernel. Hopefully it
 will get ported to other BSDen sometime soon.)

Have fun with it, rick
ps: If you don't want to receive messages related to my NFSv4 work, just
    let me know and I'll take you off the list.