If you use keywords for your blog, your marketing message or meta data, you will want to check out the free keyword suggestion tool from WordStream. Above is a screen shot from the FAQ page that will show you the differences between WordStream, Google and WordTracker keyword suggestion tools.
WordStream purchases keyword search data from ISPs, toolbars like Alexa and search engines. Then it gets technical:
. . . we apply sophisticated statistical models to aggregate the different keyword data sets . . . and apply powerful semantic algorithms to compute related terms.You may have your keywords nailed for your current campaigns, but if you are a new marketer, niche marketer or if you just want to see if you can improve your search engine marketing, visit today.