Try this URL: http://www.americanair.com/aa_home/aadvantage/guide/britisha.htm.

This page provides a breakdown of awards offered by American on British Airways.

You can also try the Official Frequent Flyer's Guidebook, which covers that sort of information for all of the major frequent flyer programs open to residents in the Americas. You can purchase it online at this URL: http://www.webflyer.com/@products/productnav.cgi?ID=BJJIAFBJ0B3B1626E9240C0&FILE=frr es.htm. Or go to the products section of Webflyer to see all of the publications offered.