This week's code drop is now available on linux-nfs.org in my git repo 
(cel-2.6.git) under the branch called drop-20070326.

This branch contains the remaining RPC transport switch patches against 
2.6.21-rc5, IPv6 patches (such as they are), BKL elimination patches, an 
immature set of in-kernel mount option parsing patches, and a long 
series of patches that rework the NFS client XDR routines.

The NFS XDR rewrite is partially finished.  The v2 and v3 routines are 
tested and working.  The NFSv4 encode routines are compile tested only, 
and the decode routines haven't been changed yet.

Plans include updates for NLM, rpcbind, and NFSROOT MNT.