Well OK, this is probably not news to old hands, but I just discovered it. Schematics, internal photos, etc. Here's a good starting point:
https://gullfoss2.fcc.gov/cgi-bin/ws.exe/prod/oet/forms/reports/Search_Form.hts?
Here's an example I found when using "Apple Computer" as a search term:
https://gullfoss2.fcc.gov/cgi-bin/ws.exe/prod/oet/forms/reports/Search_Form.hts?mode=Edit&form=Exhibits&application_id=945768&fcc_id=BCGA1026
Looks like the AP Extreme card to me . . . no schematics, but nice internal photos. Sadly I didn't find any schematics on any of Apple's applications I checked. 
However, others' applications did include schematics, here's an example (Cisco Aironet 340 WiFI card):
https://gullfoss2.fcc.gov/cgi-bin/ws.exe/prod/oet/forms/reports/Search_Form.hts?mode=Edit&form=Exhibits&application_id=99656&fcc_id=LDK102035
Anyway, I just figured this might be an interesting resource for some, 
Dan K