Finally, it’s here…. ISA 2006 SP1 was released last night.
You find it at http://www.microsoft.com/downloads/details.aspx?FamilyId=D2FECA6D-81D7-430A-9B2D-B070A5F6AE50&displaylang=en
Please read other blogposts here and also at http://blogs.technet.com/isablog/archive/2008/05/23/isa-server-2006-service-pack-1-features.aspx for information on all the new stuff in SP1.
Enjoy!