Today I'm doing some research for my up coming presentation.  Here are some interestesting links I found:

Peli - Reflector.Review, a lightweight code annotation tool

Peli - Refly language for reflector (preview): decompile to CodeDom!

Peli - Reflector Add-in Tutorial (+ bonus helper classes)

James Avery and Jim Holmes - Analyzing Assemblies with Reflector

Jamie Cansdale - Building the Reflector Add-In

James Avery - Reflector Add-in

Scott Hanselman - Reflector 5 Released - World Domination Assured

Scott Mitchell - Decompiling .Net Assemblies

Jelle Druyts - The Ultimate Reflector Setup