Great theme!

Question #1: Is there a limit to the number of categories in Market? I have a site that sells discount gift certificates for local businesses and need many different categories of businesses who will offer the certificates.

Question #2: When a customer purchases the gift card through the PayPal gateway and they are returned to the gift certificate download page, is there a way to assign each certificate a unique number so that someone can't just download 10 cards after paying for one? My initial thought was to have the customer print their PayPal reciept and bring it in with the certificate, but that's cumbersome and a hokey way to do business.

Many thanks for any assistance!