I recently started a new blog that is turning out to be incredibly friendly with search engines. My logs show that people are frequently getting to my site through keyphrases that aren't even in the stratosphere of my intended keyword avenues.

Now, that's awesome, but I'd really like to know all the keywords out there that rank me in their serps... is there no such tool that shows you all the keywords your site ranks for within a designated page range? Am I totally blanking out on one of the obvious tools that can achieve this?