The MS06-071 patch should now be available on SUS 1.0 servers for approval. Reader Andrew reports having seen MSXML 4.0 SP2 Security Update (KB927978), 11/17/2006 and MSXML 6.0 RTM Security Update (KB927977), 11/17/2006 show up. The Microsoft Security Response Center Blog made the announcement here.
Microsoft have also announced that support for SUS 1.0 will be further extended until Patch Tuesday July 10, 2007. The announcement appears on the main SUS page. MS06-071 not being available for SUS 1.0 when it was released was also discussed on the Microsoft blog, as well as the SUS drop dead date extension.

Cheers,
Adrien de Beaupre