The biggest change in the industry lately has been the dramatic rolling out of new features in the Google Adwords Keyword Tool, where they added monthly traffic volume estimates, the Google Trends tool, where they report website traffic numbers in uniques-per-day in an Alexa-like graph (log in for absolute numbers), and most recently with their Google Search Insights tool, which is like an interative Zeitgeist. To a lesser extent, some new features are rolling out in Webmaster Central. And contrary to popular wisdom, Microsoft has some of the best keyword research tools in the industry wrapped into Ad Center–but it’s a pretty big learning committment to get to the point where you can use them. SpyFu remains the best tool, albeit expensive, for spying on your client’s AdWords campaigns. And of course, HitTail, with it’s new features including the rockin’ feature where you can add new content to your blog directly from your To Do list (which I’m doing now) is hands-down the best way to identify the content-challenged sweet spots in your website, and the actual mechanism to publish the content. Of course, I’m biased.