as a result of Geekzone going IPv6, i decided to see what i needed to do to get IPv6 connected to the corporate.  To my surprise, i found that Microsoft's newest version of ISA Server - Forefront TMG 2010 - still doesnt do IPv6!  I was shocked when i saw that. It just discards all IPv6 traffic.  I had just assumed it would be included.  Especially as some of the new Microsoft features - such as homegroups, branchcache etc - use IPv6 only.