<p>My university is part of MSDNAA, so I downloaded it a while back, but I just got around to installing it. I guess part of it replaces FrontPage for web editing, and there appears to be a video editor and a vector graphics editor, but I don't think I've even scratched the surface of what it is and what it can do. Could someone enlighten me, especially since I haven't found an "Expression Studio for Dummies" type website.</p>

From
Wikipedia
:
Microsoft Expression Studio is a suite of design and media applications from Microsoft aimed at developers and designers. It consists of:
Microsoft Expression Web (code-named Quartz) - WYSIWYG website designer and HTML editor.
Microsoft Expression Blend (code-named Sparkle) - Visual user interface builder for Windows Presentation Foundation and Silverlight applications.
Microsoft Expression Design (code-named Acrylic) - Raster and vector graphics editor.
Microsoft Expression Media - Digital asset and media manager.
Microsoft Expression Encoder - VC-1 content professional encoder.
For web development Expression Web is useful. For XAML development, Blend and Design are useful.