The first noticable change in EW3 is the Interface.
Expression Web 3 comes with a lot more than it ever did in the past.
When you buy Expression Web 3, you will get:
This is a pleasant Surprise. I already use Adobe Creative Suite for graphics, but having Design 3 will allow me to make some tutorials for all of you. You can pre-order your copy of Expression Web 3 on the microsoft web site. Upgrades are only $79.
Will EW 3 change the way we build web pages with CSS? No!! This means all the tutorials on my main web site will continue to work for all Versions of Expression Web. Any exceptions will be noted along with the tutorial.
What's New In Expression Web 3?
How to Set up a Web Site in Expression Web 3 <-- Start Here