The What's New Guide is completely new and is a great way to browse all the new stuff for 2010. You can view the What's New Guide for SolidWorks 2010 at Ricky Jordan's What's New Document Site.
Each year when the beta program would launch, one of the first things I would do would be to print out the guide and then take it to Staples to get it bound. It made for a handy desktop reference during the beta program, and also as a way to see all the new stuff. Ricky also has a bunch of great videos covering the whats new stuff at his site as well.