In a reader business card submission, DJElliot asks "Really, since I don't have a storefront, do I need a physical address? Would a cell number & email address suffice?"
I say that if you have a business that doesn't involve walk-in customers or being always available for face-to-face meetings -- especially if home-based -- then having a physical address on your card isn't really necessary. If your preferred method of contact involves phone or email or the Web then those are the most important contact methods to have on your business card. If a face-to-face meeting becomes necessary, that can be arranged by phone or email after the initial contact.
Agree or disagree? Add your comments on the pros and cons of having a physical and/or mailing address on your business card.
Update: Very first comment when I originally posted this was against leaving off the physical address. Paul writes, "Not showing a real physical address looks like you are trying to hide." Have you changed your mind (or your business card) in the last few years? Sound off in the comments.