Google is apparently testing a new AdWords keyword Tool. You have to be logged into your AdWords account and click on the keyword tool feature to see it. Then when you get there, you will see the old keyword tool with a link to the beta tool.
Here is a picture of the old keyword tool:
When you click on that link towards the top, you get the new keyword tool which is way more advanced. It is broken into two parts, top and bottom. Here is a screen shot of the top:
Then when you add words and filters, you can then get reports that not just show traffic and click estimates but brings in Google other various tools to give deeper insight into those keywords. I could have taken a screen shot myself, but "searchengineman" in Search Engine Watch Forums did a great screen shots with overlays to explain the various components of the tool. Here it is:
You can click on the image to zoom into a larger version (it goes to click and click on "all sizes" above the image).
Forum discussion at Search Engine Watch Forums.