johncory - 6:52 pm on Mar 22, 2006 (gmt 0)

but at the end of the analysis I realise I haven't learned anything new.

I think that you see new info when you look at the popularity over time.

I saw a peak of traffic at my site this past autumn and now, looking at this tool, I see that it was because a movie came out about that time with the same name as my keyword. Duh!