As a print designer in my core, I hate to see business cards becoming obsolete; on the other hand, I have a rolodex stuffed full of random cards I never consult so I understand the popularity of electronic substitutes like the iPhone/Android App "Bump" which swaps selected info with another phone when the two owners bump knuckles. Plus this handy (no pun intended) technology means the end of digit stage fright when called upon to spontaneously enter someone's contact info into your phone. I hope there will always be a niche for physical biz cards, but this is a nice (and free) option for less formal introductions.