I have just created another release of my NFS Version 4 (also supports V2 and 3)
server for BSD (currently OpenBSD3.4 and FreeBSD5.2). It has several bug fixes
for problems that cropped up under heavy load. If you are interested, you can
anonymous ftp the code from ftp.cis.uoguelph.ca in pub/nfsv4 or look at a
primitive web site http://snowhite.cis.uoguelph.ca/nfsv4.

Just fyi, rick