For a long time, the only way to play around with Google advertising possibilities was to join Adwords and then you could choose different keywords, see search volume information, estimate the ad position, clicks per day, etc…. I’ve been tempted many times to look into Adwords (which is the flip side of AdSense…) Many times. In fact, I still may, but today the Inside Adwords blog has announced the standalone traffic estimator that can be used without logging into your adwords account.