Finding an intersection of style and sustainability is sometimes challenging. Take for instance the desire to use online (paper-free) invitations, which is honorable and easy but ugly! The busy, cartoonish look of Evite and other similar sites (I was an early fan of Evite for the record) doesn't exactly exude sophistication. Enter ping. This new online invite service has it all: beautifully designed templates, rich customization features, great RVSP list management, and integration with Facebook events. Our favorite feature has to be the email invitations that allow our guests to RSVP without having to go to a web site first—very convenient.