Many parts of the Inspector UI would benefit from scope bars. Off the top of my head:
1) Search results
could all use a scope bar. I think all scope bars should have a button for each resource type that exists in the inspected page. These buttons should be toggle buttons that include/exclude that resource type. Additionally, the search results scope bar should have two more buttons, "All Resources" and "<current resource name>", similar to Mail.app's search scope bar. So you'd have something like this:
All Resources urchin.js | Documents Stylesheets Images Scripts Other
Bug 20629 represents adding a scope bar to the Resources panel.
These are the two places that needed scope bars (resources and console), so marking this bug as fixed because its dependencies are fixed.