Search Based Keyword Tool Discontinued Soon

Google’s sktool will soon be replaced by the updated keyword tool they have been developing over the past year.

Feeding off the momentum of improvements we’ve made over the past year in AdWords, we recently released beta versions of the updated Keyword and Placement Tools.

We’ve maintained the core functionality of these tools, but have added some new features that we hope will make them more useful for you. If you use English as your AdWords interface language you may have noticed that you already have access to these tools, and availability to all English advertisers as well as other languages will be rolling out over the next few weeks

source: Updated Keyword and Placement Tools