Last night i was riding with some friends. My friends wife needed to go buy a birthday card. I realized that there was an entire niche market that was not being touched by these card companies. The dual purpose card.
My first idea was: "Happy birthday and sorry about you uncle." My friend, the driver, came up with this idea: "congratulations on getting married and it is a boy"
I think that given some nice designs and a computer program that allowed the user to pick out the dual purpose card, this could work well and probably would only be a losing business for about 50 years, which is a short time if you plan on living for ever.