Business Women without Business Cards

Are business cards a thing of the past? Are people so concerned about saving the rain forests that they no longer carry anything printed with them?

I was in a meeting with 12 to 15 other business women the other day and fully 2/3 of them did not have business cards. It seemed odd to me, but maybe I am just a product of my generation and not far-sighted enough?

It would be interesting to know what others think about this.