I just logged on to AA.com to print my boarding pass only to discover that AA did an aircraft change and my assigned seat happens to be in a non-existent row! Called the Exec Plat line and was immediately moved from my coach seat to business class seat! Sweet! What I found interesting is that the reservation on AA.com still shows the aircraft as 757, but when you click on the "change seat" link, the seat map is for a 777-200 even though it is titled 757... Wondering why they are using a trip 7 on this route??? Re-positioning maybe?