maybe this http://haveamint.com/
i forgot the name of the other one
http://www94.wolframalpha.com ?
http://crazyegg.com/ ?
...hmmm... It was that one from 2002 (?) that closed for a while and re-opened a couple of years ago...
http://www.reinvigorate.net/
AH! That's it. Thanks uan - and thanks all.