A neat way to review Visual Studio 2008 code metrics results (and for large projects the list may become pretty large) is to use built-in filter functionality:
One may select any available column (Maintainability Index etc.) in Filter combo box, and specify Min/Max range. Additional neat feature of Code Metrics window is that all filter ranges applied are added to Filter combo box list, and thus can be easily reused:
The downside of this feature is that once you have applied several filters the combo box list can become pretty long. To remove the custom filters from the list one may clear certain registry entry value, viz. HCU\Software\Microsoft\VisualStudio\9.0\EnterpriseTools\CodeMetrics key, value MRUList) (sorry for not finding more elegant supported way of doing it).