Google has updated the AdWords Keyword tool.
There are some very useful 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 ability to generate a keyword list based on a specific URL and can also include other pages linked to from that URL. Keyword lists can also be downloaded in .csv format
There are other features as well and worth checking out. Could also be very useful for organic keyword research.
If you don’t have an AdWords Account, you can see screen shots at Online Marketing Blog.