Business card bouquet- Though I am not sure what a bouquet of flowers has to do with a marketing company I think that this is an interesting business card design, how it folds to look like a bouquet. However I think it would more effective if it was a card for a florist.
JOANNA This is an example of an envelope design that also folds out to be a letterhead. It seems very creative as an actual letterhead isn't needed to be filled within the envelope, though if wanted, can be. Postcards could also fit into the envelope which then could fold out to send out another message just like this design.