Heading out to the World Fantasy Convention, I come prepared, with a small stack of business cards that I did myself. Why not pay and have it done right? Mostly because I am not convinced people still use business cards. They don't fit anywhere, and in an age where everything is easily digitized, I think perhaps their time is at an end. Which means the most important information on a card is your email and blog address, as well as your web page.
Business cards---They're disposable. Hard to handle, easily lost, and quickly forgettable.