ZRH-ORD, ZRH-JFK, GVA-JFK.

All summer season.

Days: Thu, Fri, Sat, Mon and Tue.

What might have helped is that I got to know JFK the JFK lounge ladies by chatting a few times. Although I remember most upgrades were already processed when I got the airport.

See

http://www.flyertalk.com/forum/Forum40/HTML/000800.html

for information on why it is not wise to use the e-checkin machine on overbooked longhauls - at least if you want to sit in C-class.