Straight from the email…
"Your Free Wednesday Code For 04/05/11 is WED142KXB.
Your Monthly Free Wednesday Promo Code is valid for a one night free rental, of any one DVD, from any Oovie machine only on May 4th 2011.
Here's how it works:
Visit any Oovie machine on the first Wednesday of the month.
Choose the movie you want to rent.
Enter the Promo Code for that Wednesday.
Swipe your credit card - so we know it's you - and out comes your free DVD.
Your free rental is due back to any Oovie machine by 9pm the following night, or keep renting for just $2.99 per night.
Enjoy.
Team Oovie."
sweeeeet, thanks op