2005 October

Google has updated the AdWords Keyword Tool.
Here are some very cool features including the ability to “review detailed keyword performance statistics like advertiser competition and search volume.”:
Keyword Variations works much the same way except now you can sort the results by popularity, performance history, cost and predicted ad position.
A new Site-Related Keywords feature offers the [...]

A question that often comes up from people looking into search marketing involves the source of popularity data that many keyword research tools report. Below are notes on several of the most often used tools - paid and free. This is not comprehensive by any means, but very helpful for quick checking.
Wordtracker.com gets keyword data [...]