Have you signed up for your Wine.woot "birthday" coupon?
According to this thread, if you email email@example.com you will get a coupon for $4.98 off a wine.woot purchase (basically free shipping). The main restriction is that you must use it in the month of your Woot "birthday", the month that you signed up on woot. Not your real birthday month, your join date month.
Have you ever emailed them, or gotten and used your birthday coupon on wine.woot? Does anyone know if the promotion is still going on?