Picaboo sent the following offer:

500 Fans will get 50 free cards
On Nov. 29 at 7 am and again at 7 pm Pacific Time, a code will be posted that 250 fans can use to get 50 free cards

How to win:
1. "Like" us on Facebook
2. Create you Holiday Card in Picaboo X
3. Visit our Facebook page at 7 am or 7 pm on November 29th

Sounds like the code will be posted to fans and the first 250 to enter it will get their cards free, so you'll want to have your cards made and ready to go.

Good luck!