Take a look at Snap.Com which shows you the number of inquiries for a typed in phrase and related words - kinda cool.
Clicking through the site, what is the source for the numbers? I mean, they don't match overture or word tracker(I did some quick tests), so they local to their site? BTW, they have 'free' submissions page. tom
Page 2 of the tour lists a little detail. For example, "No. of Clicks is the count of users in the Snap Network since January 2004 who entered the same search you just did, and who then clicked on this listing".
I believe that is a reflection of their traffic. I think its amazing. Imagine if they were describing google traffic. That would be invaluable. Dave