How can I check actual availability on flights?
 

A while back, thetrip.com would show you available seats by booking class, just like a travel agent would see them. I always found that very helpful in determining which flight to choose when I am either looking for an upgrade or a bump. That website took away that screen and now they just show you if the flight is available. Does anybody know how I can check actual and/or authorized seats by flight? Any insights would be greatly appreciated.

There used to be several sites that are no longer available. Check the last parts of the following thread and you will see some alternatives.

http://www.flyertalk.com/forum/Forum1/HTML/009504.html