I just discovered that Google has updated their AdWords campaigns interface to include "account statistics tabs." The new tabs are named "Summary," "Keywords," and "Ad Variations," they can be found if you click deeper into a campaign. AdWords posted a help page that describes each tab. I have also posted a screen capture at the Search Engine Roundtable.
From the help page:
+ Summary displays the performance totals for your Ad Group.
+ Keywords shows you how individual keywords are performing, and allows you to add new keywords or edit existing ones. This tab appears only in campaigns with keyword-targeted ads.
+ Sites shows you how your ad is performing on individual sites you have selected. You can add new sites or change your bid for existing ones. This tab appears only in campaigns with site-targeted ads.
+ Ad Variations displays all the ads you have created for this campaign. You can add, edit or delete ads here.