As some of you know, United sponsors the US Open and generally has a booth with a giveway.
2 years ago, you got a coupon (15% off I think), some luggage tags, a chance to win a trip, and a stylus/pen for Premiers.
Last year it was a sad "get your photo taken with a cardboard John McEnroe."
This year the USTA has more info online and it says that United will be giving away 10% off domestic e-certs and a US Open pin. (They are also letting people check-in at the booth with the new web-based check-in. Wonder if they've installed the new gate readers at LGA yet.)
http://www.usta.com/americanexpress/...leMX_USTA.html
Enjoy,
BillJ