In general, I prefer these free tools to SeatCounter, because they generally put the buckets in order by price:

http://flyaow.com/classamex.htm (For AA - truncates after 14 buckets, though)
http://publicbackup.com/shared/flyertalk/availability/ (For US)

Of course, now that I have an ExpertFlyer subscription, I use that exclusively. It's well worth the price for those airlines for which it has access to hidden award inventory. Plus it has saved queries, automatic fare alerts, etc.