A great day for NFS interoperability and proliferation!
For NFSers this gives us access to source code of the Solaris 10 NFS client and server, especially the Solaris NFSv4 client and server. Make sure you understand the terms and conditions of the licenses for this code before using it.
It does not appear that most of the GSS-API code made it, including the RPCSEC_GSS source code. You'll have to scour the net for the tirpc-99 wad Sun released in 1999. One of these days,
I'll have to post the source code for that.