Would a greeting e card be a good option for Fluther?

Recently a really sweet jelly invited me to her birthday party, along with a lot of other Jellies, I’m sure. I can’t go, she lives across the pond. I’d like to wish her a happy birthday with an ecard. I have a Hallmark account, but of course I don’t know her email address. I can understand the need to preserve anonymity, but it is a bit limiting.
I got to thinking, would there be any way for Fluther to add an e-card greeting option? I could either send the ecard to Fluther and the people who do that sort of thing could then forward it to her email, or maybe Fluther could add a section where we could purchase an ecard and send it internally.
Would that work? Is it feasible? Would anyone else utilize this option if it were available?