I guess this will help us validate our ideas for new websites! http://adwords.blogspot.com/2006/03/keyword-tool-global-trends-and-other.html this is a pretty sweet looking tool!
some interesting results to test it: London Attack Christimas Carnaval Web Hosting (normal along the year)
I was looking at it last night, indeed it looks cool but it lacks scale. It will show trend through the year but not some tangible measure of scale. It's nice to know something has doubled but is it double from five hits or doubled from a million. I am pondering why Google doesn't provide numbers or even a range
This is inside the keyword tool, it is just a quick feature to take a decision to add or not a single keyword and go fast to the next one to decide again. I think that scale numbers would make the keyword tool too heavy for people like me that stay 6 hours a day in front of it.