Neat, the slides from my “Introduction  to Code Access Security” presentation are available on the New Jersey Microsoft Developer's Group site.  The presentation was a 30 min, high-level introduction to Code Access Security.  Very newbie-friendly :) 

While you are there, be sure to check out Brad (Infragistics) McCabe's  ASP.NET tips and the excellent WinForms binding presentation by Jeff Lyttle.