At a conference, it's all about swapping business cards. This meant inputting contact information into your address book when you got home. With CamCard (free), just snap a picture of the card and you're done. Sure, some iPhone business reader apps wirelessly link up phones, but that seems a little intimate for someone you just met. Besides, it's hard to refuse such a request. Just gimme your damn card.
Similar business-card scanner apps include CardMunch (free) and WorldCard Mobile ($6.99).