Earlier this week, the Google AdWords team announced that you can find a lot more detail about the quality score of your ad in AdWords:
The new Keyword Analysis page gives you a detailed breakdown of your keyword's Quality Score and how it might impact your ad's visibility. Specifically, you'll learn how keyword quality and landing page quality are performing and receive recommendations for improvement.
Here's what it looks like:
This is exciting news for advertisers, but a few questions remain: if Google suggests that you delete a particular keyword, can't you still improve your Quality Score by revising the ad copy or the landing page? (I'd think so, wouldn't you?)
Forum discussion continues at WebmasterWorld.