Combining twitter & postal mail…a good idea?

Today at work, I got a card in the mail that blew my mind. One of the people that followed me, @Enthusem, sent me this card instead of a silly auto-dm. Not only was it delivered in a pretty cool envelope, it definitely caught my attention. I honestly hadn’t realized I was even following @enthusem (sorry Steve) but once I got this card, I took...