Just stumbled across this thread. In the past few months I've twice gotten Avis cars thru Priceline. The first time I showed up and went to the counter in the terminal she directed me to go straight to the Prefered counter. On the second PL rental I called to add my wizard# and was told it was already on the reservation. I am guessing perhaps my credit card information or perhaps my contact information automatically pulls up my wizard#, but curious if this has happened to anyone else?