Hi,
Sounds like new 737-800, actually that plane is the second one of new 737s to be delivered to ATA (this one was delivered 6/22/01). See
http://www.geocities.com/TheTropics/...211/fleet.html
Re huge winglets, see
http://www.boeing.com/commercial/737family/index.html
"In February 2000, Boeing began offering an advanced-technology winglet made of carbon graphite as an optional feature on the 737-800. The 8-foot blended winglet will allow a new airplane that already flies further, higher and more economically than competing products to extend its range, carry up to 6,000 pounds more payload, save on fuel and benefit the environment. In May 2001, the first 737-800 with winglets made their world debut in revenue service with German Carrier Hapag-Lloyd Flug."
BR JPH