I think IPv6 should now be enabled by default in the kernel. It is an IETF standard, and comes by default with the latest versions of Solaris, AIX, and Windows NT. In addition the latest versions of SUSE Linux enable IPv6 in the kernel.
I saw your message posted to pinstripe-list; given that the public beta is already out (and that's where we give previews of new features), I;m marking this as DEFERRED. We will examine it for the next release (or another one in the future).