Certainly, present cards are always a great item to give at weddings, for your best friend to one of your closest cousins in the family. Whereas years ago, a present card for a local store may have been looked at as being tacky or thoughtless, many couples today really enjoy receiving such a present. They can head out to the store or hit their computer and shop online for the items that they want and need.
It is simply a matter of finding one with the gift card balance that you have in mind. Consider getting one from their favorite store. For example, you could buy a Macys or a Target gift card. Or, perhaps a Visa one which can be used anywhere would be better. Cards are considered very acceptable as wedding gifts in our modern times.