Not implemented, but have a plan (including ongoing ones):

Necessary for IPv6 deployment
mDNS (LLMNR), IPv6 prefix delegation, "killer applications"

Missing pieces
SSM
mobile IPv6
worried about the standardization status and procedure, though:
more and more revises
tend to require ALL nodes "support mobile nodes this way". 

Need to check how it works:
SCTP, VRRP, ISATAP, multi-sited node