New version of FxCop available at http://gotdotnet.com/team/fxcop/

Major features of this release: 

• Simplification of report xml.
• New Fix Categories: Each message is marked to indicate if the suggested fix will constitute a breaking change for previously shipped code.
• User Interface Improvements: windowing behavior has been made more consistent
• Auto Update: Sign up to get notified when a new version of FxCop is available.

New Rules:

• Design
  • Avoid excessive parameters on generic types
  • Collections should  implement generic interface
  • Do not declare static members on generic types
  • Do not expose generic lists
  • Do not nest generic types in member signatures
  • Enums should have zero value
  • Generic methods should provide type parameter
  • Members should not expose certain concrete types