Expedia is heavily advertising a $200 coupon they promise to give you if you "book and travel by January 3 2009" .
They set January 3 as the deadline, which is of course the Saturday of the New Year's weekend. Does this sound like you have to take the first leg of a round-trip by January 3, or you have to complete your whole trip by January 3? The ad doesn't specify. I called customer service and wrote emails to clarify, after I spent over $2000 on my ticket. Well, they meant, "complete travel by January 3." I thought it seemed preposterous to say "book and travel by January 3"--how could you travel by Jan. 3 if you hadn't also booked by January 3? And how could you book on January 3 for travel that day, considering it's the last Saturday of the holiday season?
I think Expedia is purposely obfuscating the travel deadline, and purposely set the deadline for travel a day early so they don't have to give coupons to people who can't get a flight on Saturday and have to travel on Sunday; and they still get the sales to people, like me, who thought if they meant "complete travel by Jan. 3" they would have said so.