A-ha! This didn't take very long, thanks to Google!
This is a PDF file of an ECCA report from June 2008 - scroll all the way down to Page 22 under Attachment 3 to see the APO map.
http://www.edmonton.ca/city_government/documents/EdmCityCentreAirport18Jun2008.pdf
The next page (23) shows a good "cross section" diagram of the APO and buildings in downtown Edmonton all the way to the river valley. You can see how the heights of the buildings and skyscrapers relate to the height limit set by the APO.
Pages 26 and 29 show some interesting post-YXD land use concept maps, including LRT.