No e-mail yet, but I got my membership number. I called on Saturday afternoon (about 48 hrs after signing up) and I was "in the system"!
In checking out their website, I see Circuit City is one of their participating stores and I'm planning a $250 Christmas purchase there anyway, so I plan on using CC gistcards from Hotwire to get $50 (20%) credit back. And can you guess where that $50 savings will be spent (hint - I have a January trip to WDW planned).
Margaret in CT