After starting portmap and doing an NFS mount... cdimage root # dmesg ... NFS: NFSv3 not supported. nfs warning: mount version older than kernel NFS: mount program didn't pass remote address!
I've used nfsv3 before so I think this may be a bogus error message and we just need to make sure that nfsv3 support is available in the kernel. But maybe not.
nvsv3 is in kernel, as of -rc4