Saw this in the “Windows Platform News” email today…
Get hands-on experience with the new Internet Security and Acceleration (ISA) Server 2004 Interactive Training. You will have the chance to actively test-drive the new ISA Server 2004 user interface as you navigate a series of simple tasks.
I walked through the first part of it. Very easy to do and very slick. If you have a spare hour, and you want a really solid introduction on ISA Server 2004, I highly recommend this training.